diff --git a/Capfile b/Capfile
index 9b62e32..6a7be94 100644
--- a/Capfile
+++ b/Capfile
@@ -1,8 +1,8 @@
 # Load DSL and set up stages
-require 'capistrano/setup'
+require "capistrano/setup"
 
 # Include default deployment tasks
-require 'capistrano/deploy'
+require "capistrano/deploy"
 
 require "capistrano/scm/git"
 install_plugin Capistrano::SCM::Git
@@ -21,13 +21,13 @@ install_plugin Capistrano::SCM::Git
 # require 'capistrano/rvm'
 # require 'capistrano/rbenv'
 # require 'capistrano/chruby'
-require 'capistrano/bundler'
-require 'capistrano/rails/assets'
-require 'capistrano/rails/migrations'
-require 'capistrano/puma'
+require "capistrano/bundler"
+require "capistrano/rails/assets"
+require "capistrano/rails/migrations"
+require "capistrano/puma"
 # require 'capistrano/puma/nginx'   # if you want to upload a nginx site template
 # require 'capistrano/passenger'
 # require 'capistrano/rvm'
 
 # Load custom tasks from `lib/capistrano/tasks` if you have any defined
-Dir.glob('lib/capistrano/tasks/*.rake').each { |r| import r }
+Dir.glob("lib/capistrano/tasks/*.rake").each { |r| import r }
diff --git a/Gemfile b/Gemfile
index 3257afb..77626ce 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,98 +1,98 @@
-source 'https://rubygems.org'
+source "https://rubygems.org"
 
-gem 'rails', '~> 5.2.0'
-gem 'bootsnap'
+gem "rails", "~> 5.2.0"
+gem "bootsnap"
 
-gem 'sqlite3'
-gem 'pg'
+gem "sqlite3"
+gem "pg"
 
-gem 'sass-rails'
+gem "sass-rails"
 
-gem 'uglifier'
-gem 'coffee-rails'
-gem 'mini_racer', platforms: :ruby
-gem 'jquery-rails'
+gem "uglifier"
+gem "coffee-rails"
+gem "mini_racer", platforms: :ruby
+gem "jquery-rails"
 
-gem 'slim-rails'
+gem "slim-rails"
 
-gem 'rails-i18n'
+gem "rails-i18n"
 
-gem 'devise'
-gem 'devise-i18n'
+gem "devise"
+gem "devise-i18n"
 
-gem 'simple_form'
+gem "simple_form"
 
 # Phone validation
-gem 'phony', '~> 2.15.11'
-gem 'phony_rails'
+gem "phony", "~> 2.15.11"
+gem "phony_rails"
 
 # Picture uploads
-gem 'carrierwave'
-#gem 'rmagick'
+gem "carrierwave"
+# gem 'rmagick'
 gem "mini_magick"
 
-gem "refile", github: 'refile/refile', require: ['refile/rails', 'refile/simple_form']
+gem "refile", github: "refile/refile", require: ["refile/rails", "refile/simple_form"]
 gem "image_processing"
 
-gem 'puma', group: :production
+gem "puma", group: :production
 
-gem 'globalize'
+gem "globalize"
 
-gem 'yaml_db'
+gem "yaml_db"
 
-gem 'bootstrap-sass'
-gem 'bootstrap-sass-extras'
-gem 'bootswatch-rails'
-gem 'autoprefixer-rails'
-gem 'font-awesome-sass', '~> 4.6.2'
+gem "bootstrap-sass"
+gem "bootstrap-sass-extras"
+gem "bootswatch-rails"
+gem "autoprefixer-rails"
+gem "font-awesome-sass", "~> 4.6.2"
 
-gem 'nested_form'
-gem 'jquery-datatables-rails'
-gem 'morrisjs-rails'
-gem 'raphael-rails'
+gem "nested_form"
+gem "jquery-datatables-rails"
+gem "morrisjs-rails"
+gem "raphael-rails"
 
-gem 'copy_carrierwave_file'
+gem "copy_carrierwave_file"
 
-gem 'jbuilder'
+gem "jbuilder"
 
-gem 'search_object'
+gem "search_object"
 
-gem 'faraday'
+gem "faraday"
 
-gem 'rqrcode'
+gem "rqrcode"
 
 group :development do
-  gem 'spring'
-  gem 'spring-commands-rspec'
-  gem 'guard-rspec' # Continuous testing with Guard
-  gem 'rails-erd'
-  gem 'pry-rails'
+  gem "spring"
+  gem "spring-commands-rspec"
+  gem "guard-rspec" # Continuous testing with Guard
+  gem "rails-erd"
+  gem "pry-rails"
   # gem 'hirb'
-  gem 'awesome_print'
-  gem 'capistrano'
-  gem 'capistrano-rails'
+  gem "awesome_print"
+  gem "capistrano"
+  gem "capistrano-rails"
   # gem 'capistrano-rvm'
-  gem 'capistrano3-puma'
-  gem 'better_errors'
-  gem 'binding_of_caller'
+  gem "capistrano3-puma"
+  gem "better_errors"
+  gem "binding_of_caller"
 end
 
 group :development, :test do
-  gem 'rspec-rails'
-  gem 'factory_bot_rails'
-  gem 'faker'
-  gem 'capybara'
-  gem 'selenium-webdriver'
+  gem "rspec-rails"
+  gem "factory_bot_rails"
+  gem "faker"
+  gem "capybara"
+  gem "selenium-webdriver"
 
-  gem 'byebug'
-  gem 'simplecov'
-  gem 'i18n-tasks'
+  gem "byebug"
+  gem "simplecov"
+  gem "i18n-tasks"
 
-  gem 'delorean'
+  gem "delorean"
 
-  gem 'standard'
+  gem "standard"
 end
 
 group :test do
-  gem 'database_cleaner'
+  gem "database_cleaner"
 end
diff --git a/Guardfile b/Guardfile
index 6516f56..2c31b20 100644
--- a/Guardfile
+++ b/Guardfile
@@ -1,17 +1,17 @@
 # More info at https://github.com/guard/guard#readme
 
-guard :rspec, cmd: 'spring rspec' do
+guard :rspec, cmd: "spring rspec" do
   watch(%r{^spec/.+_spec\.rb$})
   watch(%r{^lib/(.+)\.rb$})     { |m| "spec/lib/#{m[1]}_spec.rb" }
-  watch('spec/spec_helper.rb')  { 'spec' }
-  watch('spec/rails_helper.rb')  { 'spec' }
+  watch("spec/spec_helper.rb")  { "spec" }
+  watch("spec/rails_helper.rb") { "spec" }
 
   watch(%r{^app/(.+)\.rb$})                           { |m| "spec/#{m[1]}_spec.rb" }
   watch(%r{^app/(.*)(\.erb|\.haml|\.slim)$})          { |m| "spec/#{m[1]}#{m[2]}_spec.rb" }
   watch(%r{^app/controllers/(.+)_(controller)\.rb$})  { |m| ["spec/routing/#{m[1]}_routing_spec.rb", "spec/#{m[2]}s/#{m[1]}_#{m[2]}_spec.rb", "spec/acceptance/#{m[1]}_spec.rb"] }
-  watch(%r{^spec/support/(.+)\.rb$})                  { 'spec' }
-  watch('config/routes.rb')                           { 'spec/routing' }
-  watch('app/controllers/application_controller.rb')  { 'spec/controllers' }
+  watch(%r{^spec/support/(.+)\.rb$})                  { "spec" }
+  watch("config/routes.rb")                           { "spec/routing" }
+  watch("app/controllers/application_controller.rb")  { "spec/controllers" }
 
   # Capybara features specs
   watch(%r{^app/views/(.+)/.*\.(erb|haml|slim)$})     { |m| "spec/features/#{m[1]}_spec.rb" }
diff --git a/Rakefile b/Rakefile
index ba6b733..1d92159 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,6 +1,6 @@
 # Add your own tasks in files placed in lib/tasks ending in .rake,
 # for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
 
-require File.expand_path('../config/application', __FILE__)
+require File.expand_path("../config/application", __FILE__)
 
 Rails.application.load_tasks
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index a6f23b9..1d4c000 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -9,10 +9,10 @@ class ApplicationController < ActionController::Base
   before_action :set_view_paths
 
   # TODO: make this get the domain from the database
-  #layout Proc.new { |controller| controller.request.host }
-  layout 'public/application'
+  # layout Proc.new { |controller| controller.request.host }
+  layout "public/application"
 
-  def self.default_url_options(options={})
+  def self.default_url_options(options = {})
     if I18n.locale != I18n.default_locale
       options.merge({locale: I18n.locale})
     else
@@ -24,17 +24,16 @@ class ApplicationController < ActionController::Base
 
   def set_locale
     I18n.locale = params[:locale] || I18n.default_locale
-    if user_signed_in? and current_user.language != I18n.locale
+    if user_signed_in? && (current_user.language != I18n.locale)
       current_user.update(language: I18n.locale)
     end
   end
 
   def set_view_paths
     # TODO: make this get the domain from the database
-    prepend_view_path 'lib/initfest/views' if request.host =~ /openfest/
-    prepend_view_path 'lib/initfest/views' if request.host =~ /example/
-    prepend_view_path 'lib/initfest/views' if request.host =~ /127\.0\.0/
-
+    prepend_view_path "lib/initfest/views" if request.host =~ /openfest/
+    prepend_view_path "lib/initfest/views" if request.host =~ /example/
+    prepend_view_path "lib/initfest/views" if request.host =~ /127\.0\.0/
   end
 
   protected
diff --git a/app/controllers/concerns/current_conference_assigning.rb b/app/controllers/concerns/current_conference_assigning.rb
index d39fbc3..0f304cb 100644
--- a/app/controllers/concerns/current_conference_assigning.rb
+++ b/app/controllers/concerns/current_conference_assigning.rb
@@ -11,8 +11,8 @@ module CurrentConferenceAssigning
   end
 
   def current_conference
-    if not @current_conference
-      if @conference and not @conference.new_record?
+    unless @current_conference
+      if @conference && !@conference.new_record?
         @current_conference = @conference
       elsif params[:conference_id].present?
         @current_conference = Conference.find(params[:conference_id])
@@ -23,8 +23,8 @@ module CurrentConferenceAssigning
   end
 
   def require_current_conference!
-    if not current_conference?
-      raise ActionController::RoutingError.new('Not Found')
+    unless current_conference?
+      raise ActionController::RoutingError.new("Not Found")
     end
   end
 end
diff --git a/app/controllers/concerns/public_api_exposing.rb b/app/controllers/concerns/public_api_exposing.rb
index 17b541e..9450a09 100644
--- a/app/controllers/concerns/public_api_exposing.rb
+++ b/app/controllers/concerns/public_api_exposing.rb
@@ -1,14 +1,14 @@
-require 'active_support/concern'
+require "active_support/concern"
 
 module PublicApiExposing
   extend ActiveSupport::Concern
 
   def set_access_control_headers
     if request.format.json?
-      response.headers['Access-Control-Allow-Origin'] = '*'
+      response.headers["Access-Control-Allow-Origin"] = "*"
     end
   end
-  
+
   included do
     before_action :set_access_control_headers
   end
diff --git a/app/controllers/confirmations_controller.rb b/app/controllers/confirmations_controller.rb
index 17a4feb..1e3efc1 100644
--- a/app/controllers/confirmations_controller.rb
+++ b/app/controllers/confirmations_controller.rb
@@ -6,9 +6,9 @@ class ConfirmationsController < Devise::ConfirmationsController
     if resource.errors.empty?
       set_flash_message(:notice, :confirmed) if is_flashing_format?
       sign_in(resource_name, resource)
-      respond_with_navigational(resource){ redirect_to after_confirmation_path_for(resource_name, resource) }
+      respond_with_navigational(resource) { redirect_to after_confirmation_path_for(resource_name, resource) }
     else
-      respond_with_navigational(resource.errors, status: :unprocessable_entity){ render :new }
+      respond_with_navigational(resource.errors, status: :unprocessable_entity) { render :new }
     end
   end
 end
diff --git a/app/controllers/management/conferences_controller.rb b/app/controllers/management/conferences_controller.rb
index 85b4b37..f02d778 100644
--- a/app/controllers/management/conferences_controller.rb
+++ b/app/controllers/management/conferences_controller.rb
@@ -2,10 +2,10 @@ module Management
   class ConferencesController < ManagementController
     def new
       @conference = Conference.new
-      @conference.event_types.build(name: 'Event type 1')
-      @conference.tracks.build(name: 'Track 1')
-      @conference.halls.build(name: 'Hall 1')
-      @conference.volunteer_teams.build(name: 'Volunteer Team 1')
+      @conference.event_types.build(name: "Event type 1")
+      @conference.tracks.build(name: "Track 1")
+      @conference.halls.build(name: "Hall 1")
+      @conference.volunteer_teams.build(name: "Volunteer Team 1")
     end
 
     def create
@@ -49,13 +49,13 @@ module Management
 
       begin
         if @conference.update_vote_data!
-          flash[:notice] = t('.vote_data_successfully_updated')
+          flash[:notice] = t(".vote_data_successfully_updated")
         else
-          flash[:alert] = t('.error_during_vote_data_save')
+          flash[:alert] = t(".error_during_vote_data_save")
         end
         redirect_back fallback_location: [:management, @conference]
-      rescue StandardError => e
-        flash[:alert] = t('.error_during_connection_with_voting_endpoint', error: e.message)
+      rescue => e
+        flash[:alert] = t(".error_during_connection_with_voting_endpoint", error: e.message)
         render :vote_results
       end
     end
@@ -75,9 +75,9 @@ module Management
         :title, :email, :start_date, :end_date, :description, :host_name,
         :planned_cfp_end_date, :vote_data_endpoint,
         event_types_attributes: [:id, :name, :description, :maximum_length,
-                                 :minimum_length, :_destroy],
+                                 :minimum_length, :_destroy,],
         tracks_attributes: [:id, :name, :color, :css_class, :description,
-                            :css_style, :foreground_color, :_destroy],
+                            :css_style, :foreground_color, :_destroy,],
         halls_attributes: [:id, :name, :_destroy],
         volunteer_teams_attributes: [:id, :name, :description, :color, :_destroy]
       )
diff --git a/app/controllers/management/events_controller.rb b/app/controllers/management/events_controller.rb
index 78c5d32..d0e4ea1 100644
--- a/app/controllers/management/events_controller.rb
+++ b/app/controllers/management/events_controller.rb
@@ -22,10 +22,10 @@ module Management
       @event = @conference.events.find(params[:id])
 
       if @event.update(event_params)
-        flash[:notice] = t('.event_successfully_updated')
+        flash[:notice] = t(".event_successfully_updated")
         redirect_to [:management, @conference, @event]
       else
-        render action: 'edit'
+        render action: "edit"
       end
     end
 
@@ -51,22 +51,22 @@ module Management
 
     def event_params
       params.require(:event).permit(
-                                    :title,
-                                    :subtitle,
-                                    :length,
-                                    :language,
-                                    :abstract,
-                                    :description,
-                                    :notes,
-                                    :track_id,
-                                    :event_type_id,
-                                    participations_attributes: [
-                                                                :id,
-                                                                :participant_id,
-                                                                :approved,
-                                                                :_destroy
-                                                               ]
-                                   )
+        :title,
+        :subtitle,
+        :length,
+        :language,
+        :abstract,
+        :description,
+        :notes,
+        :track_id,
+        :event_type_id,
+        participations_attributes: [
+          :id,
+          :participant_id,
+          :approved,
+          :_destroy,
+        ]
+      )
     end
   end
 end
diff --git a/app/controllers/management/management_controller.rb b/app/controllers/management/management_controller.rb
index b2818be..5286684 100644
--- a/app/controllers/management/management_controller.rb
+++ b/app/controllers/management/management_controller.rb
@@ -1,9 +1,9 @@
-require 'csv'
+require "csv"
 module Management
   class ManagementController < ::ApplicationController
     before_action :authenticate_user!, :authorize_user!
 
-    layout 'management'
+    layout "management"
 
     private
 
diff --git a/app/controllers/management/personal_profiles_controller.rb b/app/controllers/management/personal_profiles_controller.rb
index 110c14a..f32a450 100644
--- a/app/controllers/management/personal_profiles_controller.rb
+++ b/app/controllers/management/personal_profiles_controller.rb
@@ -18,7 +18,7 @@ module Management
       @profile    = find_profile
       @user       = @profile.user
 
-      if not @profile
+      unless @profile
         flash[:error] = "No profile, needs to be created"
         redirect_to action: :edit
       end
@@ -36,7 +36,7 @@ module Management
       @profile = @user.build_personal_profile(@conference, profile_params)
 
       if @profile.save
-        flash[:notice] = t('.successfully_created')
+        flash[:notice] = t(".successfully_created")
         redirect_to management_conference_personal_profile_path(@profile, conference_id: @conference.id)
       else
         render action: :new
@@ -56,7 +56,7 @@ module Management
       if @profile.update_attributes(profile_params)
         redirect_to [:management, @conference, @profile]
       else
-        render action: 'edit'
+        render action: "edit"
       end
     end
 
diff --git a/app/controllers/management/volunteers_controller.rb b/app/controllers/management/volunteers_controller.rb
index bb792c9..0ce4278 100644
--- a/app/controllers/management/volunteers_controller.rb
+++ b/app/controllers/management/volunteers_controller.rb
@@ -26,12 +26,13 @@ module Management
     end
 
     private
+
     def volunteer_params
       params.require(:volunteer).permit(:name, :picture, :email, :phone,
-                                        :tshirt_size, :tshirt_cut,
-                                        :food_preferences, :previous_experience,
-                                        :notes, :language,
-                                        volunteer_team_ids: [])
+        :tshirt_size, :tshirt_cut,
+        :food_preferences, :previous_experience,
+        :notes, :language,
+        volunteer_team_ids: [])
     end
   end
 end
diff --git a/app/controllers/public/conference_feedbacks_controller.rb b/app/controllers/public/conference_feedbacks_controller.rb
index e412f3b..486dec6 100644
--- a/app/controllers/public/conference_feedbacks_controller.rb
+++ b/app/controllers/public/conference_feedbacks_controller.rb
@@ -2,15 +2,14 @@ class Public::ConferenceFeedbacksController < Public::ApplicationController
   def index
     @conference = current_conference
     @unrated_events = @conference.events
-                        .joins(:proposition).approved
-                        .joins('LEFT JOIN feedbacks ON feedbacks.feedback_receiving_id = events.id AND feedbacks.feedback_receiving_type = \'Event\'')
-                        .where('feedbacks.session_id != ? OR feedbacks.id IS NULL', session.id).distinct
+      .joins(:proposition).approved
+      .joins("LEFT JOIN feedbacks ON feedbacks.feedback_receiving_id = events.id AND feedbacks.feedback_receiving_type = 'Event'")
+      .where("feedbacks.session_id != ? OR feedbacks.id IS NULL", session.id).distinct
 
     @rated_events = @conference.events
-                      .joins(:proposition).approved
-                      .joins(:feedbacks)
-                      .where(feedbacks: {session_id: session.id}).distinct
-
+      .joins(:proposition).approved
+      .joins(:feedbacks)
+      .where(feedbacks: {session_id: session.id}).distinct
   end
 
   def new
@@ -28,7 +27,7 @@ class Public::ConferenceFeedbacksController < Public::ApplicationController
     @feedback.session_id = session.id
 
     if @feedback.save
-      flash[:notice] = I18n.t('public.conference_feedbacks.new.success')
+      flash[:notice] = I18n.t("public.conference_feedbacks.new.success")
       redirect_to conference_feedbacks_path
     else
       render :new, status: :unprocessable_entity
diff --git a/app/controllers/public/event_feedback_qrcodes_controller.rb b/app/controllers/public/event_feedback_qrcodes_controller.rb
index 2ec1ae1..5d2586d 100644
--- a/app/controllers/public/event_feedback_qrcodes_controller.rb
+++ b/app/controllers/public/event_feedback_qrcodes_controller.rb
@@ -5,7 +5,7 @@ class Public::EventFeedbackQrcodesController < Public::ApplicationController
 
     respond_to do |format|
       format.svg do
-        render(inline: @qr.as_svg(shape_rendering: 'crispEdges', module_size: 11, fill: 'ffffff', offset: 10),
+        render(inline: @qr.as_svg(shape_rendering: "crispEdges", module_size: 11, fill: "ffffff", offset: 10),
                filename: "feedback_qr_code_#{event.id}.svg")
       end
     end
diff --git a/app/controllers/public/event_feedbacks_controller.rb b/app/controllers/public/event_feedbacks_controller.rb
index fab2938..2b7bd16 100644
--- a/app/controllers/public/event_feedbacks_controller.rb
+++ b/app/controllers/public/event_feedbacks_controller.rb
@@ -14,7 +14,7 @@ class Public::EventFeedbacksController < Public::ApplicationController
     @feedback.session_id = session.id
 
     if @feedback.save
-      flash[:notice] = I18n.t('public.event_feedbacks.new.success')
+      flash[:notice] = I18n.t("public.event_feedbacks.new.success")
       redirect_to conference_feedbacks_path
     else
       render :new, status: :unprocessable_entity
diff --git a/app/controllers/public/events_controller.rb b/app/controllers/public/events_controller.rb
index fc24a94..4cd4147 100644
--- a/app/controllers/public/events_controller.rb
+++ b/app/controllers/public/events_controller.rb
@@ -3,7 +3,7 @@ module Public
     before_action :authenticate_user!
 
     def index
-      @events = Event.joins(:conference, :proposition, :participations).where(conference: current_conference).where('propositions.proposer_id = ? OR participations.participant_id = ?', current_user.id, current_user.id)
+      @events = Event.joins(:conference, :proposition, :participations).where(conference: current_conference).where("propositions.proposer_id = ? OR participations.participant_id = ?", current_user.id, current_user.id)
     end
 
     def edit
@@ -22,7 +22,7 @@ module Public
       @event.participations.build participant: current_user, approved: true
 
       if @event.save
-        flash[:notice] = I18n.t('views.events.event_successfully_created', event_type: @event.event_type.name.mb_chars.downcase)
+        flash[:notice] = I18n.t("views.events.event_successfully_created", event_type: @event.event_type.name.mb_chars.downcase)
         after_save_redirect
       else
         render action: :new
@@ -33,7 +33,7 @@ module Public
       @event = Event.joins(:participations).find_by(id: params[:id], participations: {participant_id: current_user.id})
 
       if @event.update(event_params)
-        flash[:notice] = I18n.t('views.events.event_successfully_updated', event_type: @event.event_type.name.mb_chars.downcase)
+        flash[:notice] = I18n.t("views.events.event_successfully_updated", event_type: @event.event_type.name.mb_chars.downcase)
         after_save_redirect
       else
         render action: :edit
@@ -44,9 +44,9 @@ module Public
       @event = current_user.events.approved.find(params[:id])
 
       if @event.confirm!
-        flash[:notice] = I18n.t('views.events.successfully_confirmed', event_type: @event.event_type.name.mb_chars.downcase)
+        flash[:notice] = I18n.t("views.events.successfully_confirmed", event_type: @event.event_type.name.mb_chars.downcase)
       else
-        flash[:alert] = I18n.t('views.events.error_on_confirmation', event_type: @event.event_type.name.mb_chars.downcase)
+        flash[:alert] = I18n.t("views.events.error_on_confirmation", event_type: @event.event_type.name.mb_chars.downcase)
       end
 
       after_save_redirect
diff --git a/app/controllers/public/personal_profiles_controller.rb b/app/controllers/public/personal_profiles_controller.rb
index 6c5c85b..1aff08b 100644
--- a/app/controllers/public/personal_profiles_controller.rb
+++ b/app/controllers/public/personal_profiles_controller.rb
@@ -6,7 +6,7 @@ module Public
       @profile = current_user.build_personal_profile(current_conference, profile_params)
 
       if @profile.save
-        flash[:notice] = t('views.personal_profiles.successfully_created')
+        flash[:notice] = t("views.personal_profiles.successfully_created")
         redirect_to root_path
       else
         render action: :new
@@ -21,10 +21,10 @@ module Public
       @profile = current_user.personal_profile(current_conference)
 
       if @profile.update_attributes(profile_params)
-        flash[:notice] = t('views.personal_profiles.successfully_updated')
+        flash[:notice] = t("views.personal_profiles.successfully_updated")
         redirect_to root_path
       else
-        render action: 'edit'
+        render action: "edit"
       end
     end
 
diff --git a/app/controllers/public/volunteers_controller.rb b/app/controllers/public/volunteers_controller.rb
index 303b188..249645d 100644
--- a/app/controllers/public/volunteers_controller.rb
+++ b/app/controllers/public/volunteers_controller.rb
@@ -11,7 +11,7 @@ module Public
     def create
       @volunteer = current_conference.volunteers.build volunteer_params
       if @volunteer.save
-        flash[:notice] = I18n.t('views.volunteers.successful_application')
+        flash[:notice] = I18n.t("views.volunteers.successful_application")
         redirect_to edit_volunteer_path(@volunteer.unique_id)
       else
         render :new, status: :unprocessable_entity
@@ -21,7 +21,7 @@ module Public
     def update
       @volunteer = current_conference.volunteers.find_by! unique_id: params[:id]
       if @volunteer.update volunteer_params
-        flash[:notice] = I18n.t('views.volunteers.successful_application_edit')
+        flash[:notice] = I18n.t("views.volunteers.successful_application_edit")
         redirect_to edit_volunteer_path(@volunteer.unique_id)
       else
         render :edit, status: :unprocessable_entity
diff --git a/app/controllers/public/volunteerships_controller.rb b/app/controllers/public/volunteerships_controller.rb
index 119e09e..bb7292c 100644
--- a/app/controllers/public/volunteerships_controller.rb
+++ b/app/controllers/public/volunteerships_controller.rb
@@ -12,9 +12,9 @@ module Public
       @volunteership.build_proposition proposer: current_user, status: :undecided
 
       if @volunteership.save
-        flash[:notice] = I18n.t('views.volunteerships.you_successfully_applied_for', team: @volunteership.volunteer_team.name)
+        flash[:notice] = I18n.t("views.volunteerships.you_successfully_applied_for", team: @volunteership.volunteer_team.name)
       else
-        flash[:error] = I18n.t('views.volunteerships.an error_occurred_while_applying')
+        flash[:error] = I18n.t("views.volunteerships.an error_occurred_while_applying")
       end
 
       after_save_redirect
@@ -24,7 +24,7 @@ module Public
       @volunteership = current_user.volunteerships.find params[:id]
 
       if @volunteership.destroy
-        flash[:notice] = I18n.t('views.volunteerships.you_successfully_retracted_your_application_for', team: @volunteership.volunteer_team.name)
+        flash[:notice] = I18n.t("views.volunteerships.you_successfully_retracted_your_application_for", team: @volunteership.volunteer_team.name)
       end
 
       redirect_to volunteerships_path
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 66bf903..80e407a 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -10,7 +10,7 @@ module ApplicationHelper
       "undecided" => "default",
       "approved" => "info",
       "rejected" => "danger",
-      "backup" => "warning"
+      "backup" => "warning",
     }.with_indifferent_access[status]
   end
 
@@ -19,7 +19,7 @@ module ApplicationHelper
       "undecided" => "question",
       "approved" => "thumbs-up",
       "rejected" => "thumbs-down",
-      "backup" => "refresh"
+      "backup" => "refresh",
     }.with_indifferent_access[status]
   end
 
@@ -29,36 +29,36 @@ module ApplicationHelper
 
   def action_buttons(conference, record, actions = [:index, :show, :edit, :destroy])
     klass = record.class
-    output = ''
+    output = ""
 
     if actions.include? :index
       output += link_to(icon(:list), [:management, conference, klass], {
-        title: t('actions.index.button', models: klass.model_name.human(count: 2)),
-        class: 'btn btn-info'
+        title: t("actions.index.button", models: klass.model_name.human(count: 2)),
+        class: "btn btn-info",
       })
     end
 
     if actions.include? :show
       output += link_to(icon(:eye), [:management, conference, record], {
-        title: t('actions.view.button', model: klass.model_name.human),
-        class: 'btn btn-info'
+        title: t("actions.view.button", model: klass.model_name.human),
+        class: "btn btn-info",
       })
     end
 
     if actions.include? :edit
-    output += link_to(icon(:edit), [:edit, :management, conference, record], {
-      title: t('actions.edit.button', model: klass.model_name.human),
-      class: 'btn btn-warning'
-    })
+      output += link_to(icon(:edit), [:edit, :management, conference, record], {
+        title: t("actions.edit.button", model: klass.model_name.human),
+        class: "btn btn-warning",
+      })
     end
 
     if actions.include? :destroy
-    output += link_to(icon(:trash), [:management, conference, record], {
-      method: :delete,
-      data: {confirm: t('actions.are_you_sure')},
-      title: t('actions.destroy.button', model: klass.model_name.human),
-      class: 'btn btn-danger'
-    })
+      output += link_to(icon(:trash), [:management, conference, record], {
+        method: :delete,
+        data: {confirm: t("actions.are_you_sure")},
+        title: t("actions.destroy.button", model: klass.model_name.human),
+        class: "btn btn-danger",
+      })
     end
 
     output.html_safe
diff --git a/app/helpers/conferences_helper.rb b/app/helpers/conferences_helper.rb
index 9b22a0e..c7e067d 100644
--- a/app/helpers/conferences_helper.rb
+++ b/app/helpers/conferences_helper.rb
@@ -5,26 +5,26 @@ module ConferencesHelper
     start_date = conference.created_at.to_date
     end_date = Time.zone.now.to_date < conference.start_date.to_date ? Time.zone.now.to_date : conference.start_date.to_date
 
-    chart_data = (start_date..end_date).map do |date|
+    chart_data = (start_date..end_date).map { |date|
       {
         created_at: date,
         new_submissions: submissions_by_day[date].try(:first).try(:number) || 0,
-        new_confirmations: confirmed_by_day[date].try(:first).try(:number) || 0
+        new_confirmations: confirmed_by_day[date].try(:first).try(:number) || 0,
       }
-    end
+    }
 
     chart_data.each_with_index do |entry, index|
       entry[:all_submissions] = if index == 0
-                      entry[:new_submissions]
-                    else
-                      chart_data[index - 1][:all_submissions] + entry[:new_submissions]
-                    end
+        entry[:new_submissions]
+      else
+        chart_data[index - 1][:all_submissions] + entry[:new_submissions]
+      end
 
       entry[:all_confirmations] = if index == 0
-                                entry[:new_confirmations]
-                              else
-                                chart_data[index - 1][:all_confirmations] + entry[:new_confirmations]
-                              end
+        entry[:new_confirmations]
+      else
+        chart_data[index - 1][:all_confirmations] + entry[:new_confirmations]
+      end
     end
     chart_data
   end
diff --git a/app/helpers/events_helper.rb b/app/helpers/events_helper.rb
index 815fc65..2ea8258 100644
--- a/app/helpers/events_helper.rb
+++ b/app/helpers/events_helper.rb
@@ -1,16 +1,16 @@
 module EventsHelper
   def links_to_event_participants_for(event)
-    event.participants_with_personal_profiles.map do |participant|
+    event.participants_with_personal_profiles.map { |participant|
       if participant.has_personal_profile?
         link_to icon(:user, participant.name),
           management_conference_personal_profile_path(participant.personal_profile_id, conference_id: event.conference.id)
       else
-        link_to icon('user-plus', participant.personal_email),
+        link_to icon("user-plus", participant.personal_email),
           new_management_conference_personal_profile_path(conference_id: event.conference.id,
                                                           user_id: participant.id),
-          title: t('management.events.event.create_profile'), class: 'bg-danger'
+          title: t("management.events.event.create_profile"), class: "bg-danger"
       end
-    end.join(', ').html_safe
+    }.join(", ").html_safe
   end
 
   def participant_names_with_emails(event)
@@ -25,13 +25,11 @@ module EventsHelper
   end
 
   def participant_names(event)
-    event.participants.map do |participant|
+    event.participants.map { |participant|
       if participant.personal_profile(event.conference).present?
         profile = participant.personal_profile(event.conference)
-        "#{profile.name}"
-      else
-        nil
+        profile.name.to_s
       end
-    end.compact
+    }.compact
   end
 end
diff --git a/app/mailers/event_mailer.rb b/app/mailers/event_mailer.rb
index 8b3d3a1..3df9c14 100644
--- a/app/mailers/event_mailer.rb
+++ b/app/mailers/event_mailer.rb
@@ -1,15 +1,14 @@
-# coding: utf-8
 class EventMailer < ActionMailer::Base
   def confirmation_request(event)
     @event = event
     I18n.locale = @event.proposer.language
 
     mail to: @event.proposer.email,
-         from: 'program@openfest.org',
-         subject: I18n.t('event_mailer.acceptance_notification.subject',
-                         conference: @event.conference.title,
-                         submission_type: @event.event_type.name.mb_chars.downcase.to_s,
-                         title: @event.title)
+         from: "program@openfest.org",
+         subject: I18n.t("event_mailer.acceptance_notification.subject",
+           conference: @event.conference.title,
+           submission_type: @event.event_type.name.mb_chars.downcase.to_s,
+           title: @event.title)
   end
 
   def rejection_notification(event)
@@ -17,11 +16,10 @@ class EventMailer < ActionMailer::Base
     I18n.locale = @event.proposer.language
 
     mail to: @event.proposer.email,
-         from: 'program@openfest.org',
-         subject: I18n.t('event_mailer.rejection_notification.subject',
-                         conference: @event.conference.title,
-                         submission_type: @event.event_type.name.mb_chars.downcase.to_s,
-                         title: @event.title)
+         from: "program@openfest.org",
+         subject: I18n.t("event_mailer.rejection_notification.subject",
+           conference: @event.conference.title,
+           submission_type: @event.event_type.name.mb_chars.downcase.to_s,
+           title: @event.title)
   end
-
 end
diff --git a/app/mailers/proposition_mailer.rb b/app/mailers/proposition_mailer.rb
index 07829f3..b9080cf 100644
--- a/app/mailers/proposition_mailer.rb
+++ b/app/mailers/proposition_mailer.rb
@@ -1,4 +1,3 @@
-# coding: utf-8
 class PropositionMailer < ActionMailer::Base
   def new_proposition_notification(proposition)
     @proposition = proposition
diff --git a/app/mailers/volunteer_mailer.rb b/app/mailers/volunteer_mailer.rb
index d30a5fc..e526ff0 100644
--- a/app/mailers/volunteer_mailer.rb
+++ b/app/mailers/volunteer_mailer.rb
@@ -1,10 +1,9 @@
-# coding: utf-8
 class VolunteerMailer < ActionMailer::Base
   def team_notification(new_volunteer)
     @volunteer = new_volunteer
 
     mail(to: @volunteer.conference.email,
-         subject: "Нов доброволец – #{@volunteer.name} <#{@volunteer.email}> за екип(и) #{@volunteer.volunteer_teams.map(&:name).join(', ')}")
+         subject: "Нов доброволец – #{@volunteer.name} <#{@volunteer.email}> за екип(и) #{@volunteer.volunteer_teams.map(&:name).join(", ")}")
   end
 
   def volunteer_notification(new_volunteer)
@@ -12,8 +11,8 @@ class VolunteerMailer < ActionMailer::Base
     I18n.locale = @volunteer.language
     mail(to: @volunteer.email,
          reply_to: @volunteer.conference.email,
-         from: 'no-reply@openfest.org',
-         subject: I18n.t('volunteer_mailer.success_notification.subject',
-                         conference_name: @volunteer.conference.title))
+         from: "no-reply@openfest.org",
+         subject: I18n.t("volunteer_mailer.success_notification.subject",
+           conference_name: @volunteer.conference.title))
   end
 end
diff --git a/app/models/call_for_participation.rb b/app/models/call_for_participation.rb
index 2011576..ce81973 100644
--- a/app/models/call_for_participation.rb
+++ b/app/models/call_for_participation.rb
@@ -2,7 +2,7 @@ class CallForParticipation < ActiveRecord::Base
   belongs_to :conference
 
   def open!
-    self.opens_at = Time.now unless self.opens_at.present?
+    self.opens_at = Time.now unless opens_at.present?
     self.closes_at = nil
     save
   end
@@ -13,14 +13,14 @@ class CallForParticipation < ActiveRecord::Base
   end
 
   def open?
-    self.opens_at.present? and self.opens_at < Time.now
+    opens_at.present? && (opens_at < Time.now)
   end
 
   def closed?
-    self.closes_at.present? and self.closes_at < Time.now
+    closes_at.present? && (closes_at < Time.now)
   end
 
   def in_progress?
-    open? and not closed?
+    open? && !closed?
   end
 end
diff --git a/app/models/conference.rb b/app/models/conference.rb
index 02a7a0a..49abb8e 100644
--- a/app/models/conference.rb
+++ b/app/models/conference.rb
@@ -14,30 +14,30 @@ class Conference < ActiveRecord::Base
   has_many :halls
   has_many :event_types
   has_many :events
-  has_many :approved_events, -> { joins(:proposition).approved }, class_name: 'Event'
+  has_many :approved_events, -> { joins(:proposition).approved }, class_name: "Event"
   has_many :conflict_counts, through: :events
   has_many :volunteer_teams
   has_many :volunteers
   has_one :call_for_participation
-  has_many :participants, -> { distinct }, class_name: 'User', through: :events
-  has_many :participant_profiles, class_name: 'PersonalProfile'
+  has_many :participants, -> { distinct }, class_name: "User", through: :events
+  has_many :participant_profiles, class_name: "PersonalProfile"
   has_many :slots, through: :halls
   has_many :feedbacks, as: :feedback_receiving
-  has_many :editions, primary_key: :host_name, foreign_key: :host_name, class_name: 'Conference'
+  has_many :editions, primary_key: :host_name, foreign_key: :host_name, class_name: "Conference"
   has_many :events_of_all_editions, through: :editions, source: :events
 
   accepts_nested_attributes_for :tracks, :halls, :event_types, :volunteer_teams,
-                                reject_if: :all_blank, allow_destroy: true
+    reject_if: :all_blank, allow_destroy: true
 
   after_create :create_call_for_participation
 
   def submissions_grouped_by_day
-    submissions = events.group('date(events.created_at)').select('date(events.created_at) as created_at, count(events.id) as number')
+    submissions = events.group("date(events.created_at)").select("date(events.created_at) as created_at, count(events.id) as number")
     submissions.group_by { |s| s.created_at.to_date }
   end
 
   def submissions_grouped_by_confirmation_day
-    submissions = events.joins(:proposition).approved.confirmed.group('date(propositions.confirmed_at)').select('date(propositions.confirmed_at) as confirmed_at, count(events.id) as number')
+    submissions = events.joins(:proposition).approved.confirmed.group("date(propositions.confirmed_at)").select("date(propositions.confirmed_at) as confirmed_at, count(events.id) as number")
     submissions.group_by { |s| s.confirmed_at.to_date }
   end
 
@@ -46,7 +46,7 @@ class Conference < ActiveRecord::Base
   end
 
   def has_vote_results?
-    vote_data_updated_at.present? and number_of_ballots_cast > 0
+    vote_data_updated_at.present? && (number_of_ballots_cast > 0)
   end
 
   def has_voting_endpoint?
@@ -54,8 +54,8 @@ class Conference < ActiveRecord::Base
   end
 
   def update_conflict_data!
-    update_vote_data! or raise ActiveRecord::Rollback
-    events.all? { |event| event.update_conflict_data(false) } or raise ActiveRecord::Rollback
+    update_vote_data! || raise(ActiveRecord::Rollback)
+    events.all? { |event| event.update_conflict_data(false) } || raise(ActiveRecord::Rollback)
   end
 
   def most_conflicts
@@ -74,17 +74,16 @@ class Conference < ActiveRecord::Base
     conflict_counts.unscoped.where(left: approved_events, right: approved_events).order(number_of_conflicts: :asc).first.try(:number_of_conflicts) || 0
   end
 
-
   private
 
   def planned_cfp_end_date_is_before_start_date
-    if planned_cfp_end_date.present? and start_date.present? and planned_cfp_end_date > start_date
+    if planned_cfp_end_date.present? && start_date.present? && (planned_cfp_end_date > start_date)
       errors.add(:planned_cfp_end_date, :cannot_be_after_start_date)
     end
   end
 
   def start_date_is_before_end_date
-    if start_date.present? and end_date.present? and start_date > end_date
+    if start_date.present? && end_date.present? && (start_date > end_date)
       errors.add(:end_date, :cannot_be_before_start_date)
     end
   end
@@ -95,38 +94,38 @@ class Conference < ActiveRecord::Base
     attr_accessor :conference
 
     def number_of_ballots
-      @number_of_ballots ||= remote_summary_data['number_of_ballots']
+      @number_of_ballots ||= remote_summary_data["number_of_ballots"]
     end
 
     def ranking
-      @ranking ||= remote_summary_data['ranking'].map { |ranking_entry| EventRanking.new ranking_entry }
+      @ranking ||= remote_summary_data["ranking"].map { |ranking_entry| EventRanking.new ranking_entry }
     end
 
     def conflicts
-      @conflicts ||= remote_summary_data['conflicts'].map { |conflicts_entry| ConflictsForEvent.new conflicts_entry }
+      @conflicts ||= remote_summary_data["conflicts"].map { |conflicts_entry| ConflictsForEvent.new conflicts_entry }
     end
 
     def save
       conference.transaction do
         conference.number_of_ballots_cast = number_of_ballots
-        conflicts.all?(&:save) or raise ActiveRecord::Rollback
-        ranking.all?(&:save) or raise ActiveRecord::Rollback
+        conflicts.all?(&:save) || raise(ActiveRecord::Rollback)
+        ranking.all?(&:save) || raise(ActiveRecord::Rollback)
         conference.touch :vote_data_updated_at
-        conference.save or raise ActiveRecord::Rollback
+        conference.save || raise(ActiveRecord::Rollback)
       end
     end
 
     private
 
     def connection
-      @connection ||= Faraday.new(url: conference.vote_data_endpoint + '/summary.json',
-                                  headers: {'Content-Type' => 'application/json'})
+      @connection ||= Faraday.new(url: conference.vote_data_endpoint + "/summary.json",
+                                  headers: {"Content-Type" => "application/json"})
     end
 
     def remote_summary_data
-      @remote_summary_data ||= JSON.parse(connection.get do |request|
+      @remote_summary_data ||= JSON.parse(connection.get { |request|
                                             request.body = {summary: {talk_ids: conference.events.pluck(:id)}}.to_json
-                                          end.body)
+                                          }.body)
     end
 
     class ConflictsForEvent
@@ -136,14 +135,13 @@ class Conference < ActiveRecord::Base
 
       def save
         @event = Event.find(talk_id)
-        @event.conflict_counts.destroy_all or raise ActiveRecord::Rollback
+        @event.conflict_counts.destroy_all || raise(ActiveRecord::Rollback)
         conflicts.all? do |right_event_id, number_of_conflicts|
           ConflictCount.create left_id: talk_id, right_id: right_event_id, number_of_conflicts: number_of_conflicts
-        end or raise ActiveRecord::Rollback
+        end || raise(ActiveRecord::Rollback)
       end
     end
 
-
     class EventRanking
       include ActiveModel::Model
 
diff --git a/app/models/conflict_count.rb b/app/models/conflict_count.rb
index abd3eeb..c954adc 100644
--- a/app/models/conflict_count.rb
+++ b/app/models/conflict_count.rb
@@ -1,5 +1,5 @@
 class ConflictCount < ActiveRecord::Base
-  belongs_to :left, class_name: 'Event'
-  belongs_to :right, class_name: 'Event'
+  belongs_to :left, class_name: "Event"
+  belongs_to :right, class_name: "Event"
   has_one :conference, through: :left
 end
diff --git a/app/models/event.rb b/app/models/event.rb
index e7cbc52..bba82f9 100644
--- a/app/models/event.rb
+++ b/app/models/event.rb
@@ -6,8 +6,8 @@ class Event < ActiveRecord::Base
   has_one :slot
 
   has_many :participations, dependent: :destroy
-  has_many :pending_participations, ->() { pending }, class_name: 'Participation'
-  has_many :approved_participations, ->() { approved }, class_name: 'Participation'
+  has_many :pending_participations, -> { pending }, class_name: "Participation"
+  has_many :approved_participations, -> { approved }, class_name: "Participation"
   has_many :participants, through: :approved_participations
   has_many :participants_with_personal_profiles, through: :approved_participations, source: :participant_with_personal_profile
   has_many :conflict_counts, -> { order(number_of_conflicts: :desc) }, foreign_key: :left_id
@@ -19,7 +19,7 @@ class Event < ActiveRecord::Base
   scope :approved, -> { where(propositions: {status: Proposition.statuses[:approved]})}
 
   validates :conference, presence: true
-  validates :title, presence: true, length: { maximum: 65 }
+  validates :title, presence: true, length: {maximum: 65}
   validates :abstract, presence: true
   validates :description, presence: true
   validates :agreement, acceptance: true
@@ -61,16 +61,16 @@ class Event < ActiveRecord::Base
       language: language,
       abstract: abstract,
       description: description,
-      notes: notes
+      notes: notes,
     }
   end
 
   def ranked?
-    conference.has_vote_results? and rank.present? and number_of_votes.present?
+    conference.has_vote_results? && rank.present? && number_of_votes.present?
   end
 
   def per_cent_of_votes
-    if conference.has_vote_results? and conference.number_of_ballots_cast > 0
+    if conference.has_vote_results? && (conference.number_of_ballots_cast > 0)
       Rational(number_of_votes * 100, conference.number_of_ballots_cast)
     else
       Float::NAN
@@ -80,20 +80,20 @@ class Event < ActiveRecord::Base
   private
 
   def event_type_belongs_to_the_selected_conference
-    unless conference.present? and conference.event_types.include?(event_type)
+    unless conference.present? && conference.event_types.include?(event_type)
       errors.add :event_type, :must_be_a_valid_event_type
     end
   end
 
   def track_belongs_to_the_selected_conference
-    unless conference.present? and conference.tracks.include?(track)
+    unless conference.present? && conference.tracks.include?(track)
       errors.add :track, :must_be_a_valid_track
     end
   end
 
   def length_is_within_the_permitted_interval
     if event_type.present?
-      unless length >= event_type.minimum_length and length <= event_type.maximum_length
+      unless (length >= event_type.minimum_length) && (length <= event_type.maximum_length)
         errors.add :length, :must_be_between, minimum: event_type.minimum_length, maximum: event_type.maximum_length
       end
     end
diff --git a/app/models/event_search.rb b/app/models/event_search.rb
index 6c0632d..0973f6d 100644
--- a/app/models/event_search.rb
+++ b/app/models/event_search.rb
@@ -9,6 +9,6 @@ class EventSearch
   option(:confirmed)     { |scope, value| scope.joins(:proposition).approved.where.not(propositions: {confirmed_at: nil}) }
   option(:not_confirmed) { |scope, value| scope.joins(:proposition).approved.where(propositions: {confirmed_at: nil}) }
 
-  sort_by 'title'
-  config[:defaults]['sort'] = "#{config[:sort_attributes].first} asc"
+  sort_by "title"
+  config[:defaults]["sort"] = "#{config[:sort_attributes].first} asc"
 end
diff --git a/app/models/feedback.rb b/app/models/feedback.rb
index 37517db..af217bf 100644
--- a/app/models/feedback.rb
+++ b/app/models/feedback.rb
@@ -1,7 +1,7 @@
 class Feedback < ActiveRecord::Base
   belongs_to :feedback_receiving, polymorphic: true
 
-  validates :rating, presence: true, inclusion: {in: [2, 3, 4, 5 ,6]}
+  validates :rating, presence: true, inclusion: {in: [2, 3, 4, 5, 6]}
 
   before_create :destroy_older_feedbacks_by_the_session
 
diff --git a/app/models/participant.rb b/app/models/participant.rb
index 8284739..beea7d8 100644
--- a/app/models/participant.rb
+++ b/app/models/participant.rb
@@ -3,7 +3,7 @@ class Participant < ActiveRecord::Base
   self.primary_key = :participant_id
 
   def twitter=(handle)
-    write_attribute :twitter, handle.gsub(/\A@/,'') if handle
+    write_attribute :twitter, handle.gsub(/\A@/, "") if handle
   end
 
   def name
diff --git a/app/models/participation.rb b/app/models/participation.rb
index bfd700e..2b43099 100644
--- a/app/models/participation.rb
+++ b/app/models/participation.rb
@@ -1,8 +1,8 @@
 class Participation < ActiveRecord::Base
-  belongs_to :participant, class_name: 'User'
-  has_one :participant_with_personal_profile, class_name: 'Participant'
+  belongs_to :participant, class_name: "User"
+  has_one :participant_with_personal_profile, class_name: "Participant"
   belongs_to :event
   validates :participant_id, presence: true
-  scope :approved, ->() { where approved: true }
-  scope :pending, ->() { where.not approved: true }
+  scope :approved, -> { where approved: true }
+  scope :pending, -> { where.not approved: true }
 end
diff --git a/app/models/personal_profile.rb b/app/models/personal_profile.rb
index f513571..68a30ef 100644
--- a/app/models/personal_profile.rb
+++ b/app/models/personal_profile.rb
@@ -11,14 +11,14 @@ class PersonalProfile < ActiveRecord::Base
   validates :twitter, format: {with: /\A[a-z0-9_]{1,15}\z/i}, allow_blank: true
   validates :github, format: {with: /\A[a-z0-9][a-z0-9\-]*\z/i}, allow_blank: true
 
-  phony_normalize :mobile_phone, default_country_code: 'BG', add_plus: false
+  phony_normalize :mobile_phone, default_country_code: "BG", add_plus: false
 
   mount_uploader :picture, PictureUploader
 
   accepts_nested_attributes_for :user
 
   def twitter=(handle)
-    write_attribute :twitter, handle.gsub(/\A@/,'') if handle
+    write_attribute :twitter, handle.gsub(/\A@/, "") if handle
   end
 
   def name
diff --git a/app/models/proposition.rb b/app/models/proposition.rb
index 0fd16f2..2a917c2 100644
--- a/app/models/proposition.rb
+++ b/app/models/proposition.rb
@@ -1,5 +1,5 @@
 class Proposition < ActiveRecord::Base
-  belongs_to :proposer, class_name: 'User'
+  belongs_to :proposer, class_name: "User"
   belongs_to :proposable, polymorphic: true, dependent: :destroy
   enum status: [:undecided, :approved, :rejected, :backup]
   delegate :proposable_title, :proposable_type, :proposable_description, to: :proposable
diff --git a/app/models/track.rb b/app/models/track.rb
index f33bb85..53ce95e 100644
--- a/app/models/track.rb
+++ b/app/models/track.rb
@@ -9,7 +9,7 @@ class Track < ActiveRecord::Base
   translates :name, :description
 
   def color=(hex_triplet)
-    write_attribute :color, hex_triplet.gsub(/\A#/,'') if hex_triplet
+    write_attribute :color, hex_triplet.gsub(/\A#/, "") if hex_triplet
   end
 
   def color
diff --git a/app/models/user.rb b/app/models/user.rb
index 6734fe3..b27f8ca 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -2,13 +2,13 @@ class User < ActiveRecord::Base
   # Include default devise modules. Others available are:
   # :lockable, :timeoutable and :omniauthable
   devise :database_authenticatable, :registerable, :confirmable,
-         :recoverable, :rememberable, :trackable, :validatable
+    :recoverable, :rememberable, :trackable, :validatable
 
   has_many :personal_profiles, dependent: :destroy
   has_many :lectures
   has_many :workshops
   has_many :propositions, foreign_key: :proposer_id
-  has_many :events, through: :propositions, source: :proposable, source_type: 'Event'
+  has_many :events, through: :propositions, source: :proposable, source_type: "Event"
   has_many :participations, foreign_key: :participant_id
   has_many :events_participated_in, through: :participations, source: :event
   has_many :volunteerships, foreign_key: :volunteer_id
diff --git a/app/models/volunteer.rb b/app/models/volunteer.rb
index da33cb6..e3a4ac1 100644
--- a/app/models/volunteer.rb
+++ b/app/models/volunteer.rb
@@ -14,7 +14,7 @@ class Volunteer < ActiveRecord::Base
   validates :volunteer_teams, presence: true
   validate :volunteer_teams_belong_to_conference
 
-  phony_normalize :phone, default_country_code: 'BG'
+  phony_normalize :phone, default_country_code: "BG"
 
   belongs_to :conference
   has_and_belongs_to_many :volunteer_teams
diff --git a/app/models/volunteer_search.rb b/app/models/volunteer_search.rb
index 5f34076..11af181 100644
--- a/app/models/volunteer_search.rb
+++ b/app/models/volunteer_search.rb
@@ -3,6 +3,6 @@ class VolunteerSearch
 
   option(:volunteer_team_id) { |scope, value| scope.joins(:volunteer_teams).where volunteer_teams: {id: value} }
 
-  sort_by 'name'
-  config[:defaults]['sort'] = "#{config[:sort_attributes].first} asc"
+  sort_by "name"
+  config[:defaults]["sort"] = "#{config[:sort_attributes].first} asc"
 end
diff --git a/app/models/volunteer_team.rb b/app/models/volunteer_team.rb
index 5c5c2f7..4105cee 100644
--- a/app/models/volunteer_team.rb
+++ b/app/models/volunteer_team.rb
@@ -13,7 +13,7 @@ class VolunteerTeam < ActiveRecord::Base
   end
 
   def color=(hex_triplet)
-    write_attribute :color, hex_triplet.gsub(/\A#/,'') if hex_triplet
+    write_attribute :color, hex_triplet.gsub(/\A#/, "") if hex_triplet
   end
 
   def color
diff --git a/app/models/volunteership.rb b/app/models/volunteership.rb
index ce03c1a..92092ed 100644
--- a/app/models/volunteership.rb
+++ b/app/models/volunteership.rb
@@ -2,7 +2,7 @@ class Volunteership < ActiveRecord::Base
   include Proposable
 
   belongs_to :volunteer_team
-  belongs_to :volunteer, class_name: 'User'
+  belongs_to :volunteer, class_name: "User"
   has_one :conference, through: :volunteer_team
 
   def proposable_title
diff --git a/app/uploaders/picture_uploader.rb b/app/uploaders/picture_uploader.rb
index 55deef0..707e7e1 100644
--- a/app/uploaders/picture_uploader.rb
+++ b/app/uploaders/picture_uploader.rb
@@ -1,7 +1,6 @@
 class PictureUploader < CarrierWave::Uploader::Base
-
   # Include RMagick or MiniMagick support:
-  #include CarrierWave::RMagick
+  # include CarrierWave::RMagick
   include CarrierWave::MiniMagick
 
   # Choose what kind of storage to use for this uploader:
@@ -16,7 +15,7 @@ class PictureUploader < CarrierWave::Uploader::Base
 
   # Provide a default URL as a default if there hasn't been a file uploaded:
   def default_url
-    ActionController::Base.helpers.asset_path("fallback/profile_picture/" + [version_name, "default.png"].compact.join('_'))
+    ActionController::Base.helpers.asset_path("fallback/profile_picture/" + [version_name, "default.png"].compact.join("_"))
   end
 
   # Process files as they are uploaded:
@@ -29,21 +28,21 @@ class PictureUploader < CarrierWave::Uploader::Base
   # Create different versions of your uploaded files:
 
   version :medium do
-    process :resize_to_fit => [171, 180]
+    process resize_to_fit: [171, 180]
   end
 
   version :thumb do
-    process :resize_to_fit => [50, 50]
+    process resize_to_fit: [50, 50]
   end
 
   version :schedule do
-    process :resize_to_fill => [100, 100]
+    process resize_to_fill: [100, 100]
   end
 
   # Add a white list of extensions which are allowed to be uploaded.
   # For images you might use something like this:
   def extension_white_list
-    %w(jpg jpeg png)
+    %w[jpg jpeg png]
   end
 
   # Override the filename of the uploaded files:
@@ -51,5 +50,4 @@ class PictureUploader < CarrierWave::Uploader::Base
   # def filename
   #   "something.jpg" if original_filename
   # end
-
 end
diff --git a/config.ru b/config.ru
index 5bc2a61..193e5fe 100644
--- a/config.ru
+++ b/config.ru
@@ -1,4 +1,4 @@
 # This file is used by Rack-based servers to start the application.
 
-require ::File.expand_path('../config/environment',  __FILE__)
+require ::File.expand_path("../config/environment", __FILE__)
 run Rails.application
diff --git a/config/application.rb b/config/application.rb
index 5a98e13..8796786 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -1,6 +1,6 @@
-require_relative 'boot'
+require_relative "boot"
 
-require 'rails/all'
+require "rails/all"
 
 # Require the gems listed in Gemfile, including any gems
 # you've limited to :test, :development, or :production.
@@ -18,7 +18,7 @@ module Clarion
 
     # Set Time.zone default to the specified zone and make Active Record auto-convert to this zone.
     # Run "rake -D time" for a list of tasks for finding time zone names. Default is UTC.
-    config.time_zone = 'Sofia'
+    config.time_zone = "Sofia"
 
     # The default locale is :en and all translations from config/locales/*.rb,yml are auto loaded.
     # config.i18n.load_path += Dir[Rails.root.join('my', 'locales', '*.{rb,yml}').to_s]
@@ -29,12 +29,12 @@ module Clarion
 
     config.generators do |g|
       g.test_framework :rspec, fixtures: true,
-                             view_specs: false,
-                           helper_specs: false,
-                          routing_specs: false,
-                          request_specs: false
+                               view_specs: false,
+                               helper_specs: false,
+                               routing_specs: false,
+                               request_specs: false
 
-      g.fixture_replacement :factory_bot, dir: 'spec/factories'
+      g.fixture_replacement :factory_bot, dir: "spec/factories"
     end
   end
 end
diff --git a/config/boot.rb b/config/boot.rb
index b9e460c..988a5dd 100644
--- a/config/boot.rb
+++ b/config/boot.rb
@@ -1,4 +1,4 @@
-ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)
+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
 
-require 'bundler/setup' # Set up gems listed in the Gemfile.
-require 'bootsnap/setup' # Speed up boot time by caching expensive operations.
+require "bundler/setup" # Set up gems listed in the Gemfile.
+require "bootsnap/setup" # Speed up boot time by caching expensive operations.
diff --git a/config/deploy.rb b/config/deploy.rb
index 8ad974c..f6be4ce 100644
--- a/config/deploy.rb
+++ b/config/deploy.rb
@@ -1,14 +1,14 @@
 # config valid only for current version of Capistrano
-lock '3.11.0'
+lock "3.11.0"
 
-set :application, 'clarion'
-set :repo_url, 'https://github.com/ignisf/clarion.git'
+set :application, "clarion"
+set :repo_url, "https://github.com/ignisf/clarion.git"
 
 # Default branch is :master
 ask :branch, `git rev-parse --abbrev-ref HEAD`.chomp
 
 # Default deploy_to directory is /var/www/my_app
-set :deploy_to, '/home/barf/clarion'
+set :deploy_to, "/home/barf/clarion"
 
 # Default value for :scm is :git
 # set :scm, :git
@@ -23,10 +23,10 @@ set :deploy_to, '/home/barf/clarion'
 # set :pty, true
 
 # Default value for :linked_files is []
-set :linked_files, fetch(:linked_files, []).push('config/database.yml', 'config/secrets.yml')
+set :linked_files, fetch(:linked_files, []).push("config/database.yml", "config/secrets.yml")
 
 # Default value for linked_dirs is []
-set :linked_dirs, fetch(:linked_dirs, []).push('log', 'tmp/uploads', 'tmp/pids', 'tmp/cache', 'tmp/sockets', 'vendor/bundle', 'public/system', 'public/uploads')
+set :linked_dirs, fetch(:linked_dirs, []).push("log", "tmp/uploads", "tmp/pids", "tmp/cache", "tmp/sockets", "vendor/bundle", "public/system", "public/uploads")
 
 # Default value for default_env is {}
 # set :default_env, { path: "/opt/ruby/bin:$PATH" }
@@ -34,7 +34,7 @@ set :linked_dirs, fetch(:linked_dirs, []).push('log', 'tmp/uploads', 'tmp/pids',
 # Default value for keep_releases is 5
 set :keep_releases, 10
 
-set :rvm_ruby_version, '2.2.2'
+set :rvm_ruby_version, "2.2.2"
 
 set :puma_bind, ["tcp://127.0.0.1:9087"]
 set :puma_init_active_record, true
@@ -42,12 +42,11 @@ set :puma_access_log, "#{shared_path}/log/puma_access.log"
 set :puma_error_log, "#{shared_path}/log/puma_error.log"
 set :puma_preload_app, true
 
-set :nginx_sites_available_path, "#{shared_path}"
+set :nginx_sites_available_path, shared_path.to_s
 set :nginx_sites_enabled_path, "/tmp"
-set :nginx_server_name, 'cfp.openfest.org'
+set :nginx_server_name, "cfp.openfest.org"
 
 namespace :deploy do
-
   after :restart, :clear_cache do
     on roles(:web), in: :groups, limit: 3, wait: 10 do
       # Here we can do anything such as:
diff --git a/config/deploy/production.rb b/config/deploy/production.rb
index b1277f3..b0fae91 100644
--- a/config/deploy/production.rb
+++ b/config/deploy/production.rb
@@ -5,9 +5,7 @@
 
 # server 'example.com', user: 'deploy', roles: %w{app db web}, my_property: :my_value
 # server 'example.com', user: 'deploy', roles: %w{app web}, other_property: :other_value
-server 'marla.ludost.net', user: 'barf', roles: %w{app db web}
-
-
+server "marla.ludost.net", user: "barf", roles: %w[app db web]
 
 # role-based syntax
 # ==================
@@ -21,8 +19,6 @@ server 'marla.ludost.net', user: 'barf', roles: %w{app db web}
 # role :web, %w{user1@primary.com user2@additional.com}, other_property: :other_value
 # role :db,  %w{deploy@example.com}
 
-
-
 # Configuration
 # =============
 # You can set any configuration variable like in config/deploy.rb
@@ -31,8 +27,6 @@ server 'marla.ludost.net', user: 'barf', roles: %w{app db web}
 # http://capistranorb.com/documentation/getting-started/configuration/
 # Feel free to add new variables to customise your setup.
 
-
-
 # Custom SSH Options
 # ==================
 # You may pass any option but keep in mind that net/ssh understands a
@@ -42,9 +36,9 @@ server 'marla.ludost.net', user: 'barf', roles: %w{app db web}
 # Global options
 # --------------
 set :ssh_options, {
-#    keys: %w(/home/rlisowski/.ssh/id_rsa),
-      forward_agent: true,
-#    auth_methods: %w(password)
+  #    keys: %w(/home/rlisowski/.ssh/id_rsa),
+  forward_agent: true,
+  #    auth_methods: %w(password)
 }
 #
 # The server-based syntax can be used to override options:
diff --git a/config/environment.rb b/config/environment.rb
index 426333b..cac5315 100644
--- a/config/environment.rb
+++ b/config/environment.rb
@@ -1,5 +1,5 @@
 # Load the Rails application.
-require_relative 'application'
+require_relative "application"
 
 # Initialize the Rails application.
 Rails.application.initialize!
diff --git a/config/environments/development.rb b/config/environments/development.rb
index 2eb50ce..9841058 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -14,12 +14,12 @@ Rails.application.configure do
 
   # Enable/disable caching. By default caching is disabled.
   # Run rails dev:cache to toggle caching.
-  if Rails.root.join('tmp', 'caching-dev.txt').exist?
+  if Rails.root.join("tmp", "caching-dev.txt").exist?
     config.action_controller.perform_caching = true
 
     config.cache_store = :memory_store
     config.public_file_server.headers = {
-      'Cache-Control' => "public, max-age=#{2.days.to_i}"
+      "Cache-Control" => "public, max-age=#{2.days.to_i}",
     }
   else
     config.action_controller.perform_caching = false
@@ -34,8 +34,8 @@ Rails.application.configure do
   config.action_mailer.raise_delivery_errors = false
 
   # Use localhost for default host
-  config.action_mailer.default_url_options = {host: 'localhost:3000'}
-  config.action_mailer.default_options = {from: 'no-reply@example.com'}
+  config.action_mailer.default_url_options = {host: "localhost:3000"}
+  config.action_mailer.default_options = {from: "no-reply@example.com"}
   config.action_mailer.perform_caching = false
 
   # Print deprecation notices to the Rails logger.
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 436cb04..6c6fb2d 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -20,7 +20,7 @@ Rails.application.configure do
 
   # Disable serving static files from the `/public` folder by default since
   # Apache or NGINX already handles this.
-  config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?
+  config.public_file_server.enabled = ENV["RAILS_SERVE_STATIC_FILES"].present?
 
   # Compress JavaScripts and CSS.
   config.assets.js_compressor = :uglifier
@@ -54,7 +54,7 @@ Rails.application.configure do
   config.log_level = :debug
 
   # Prepend all log lines with the following tags.
-  config.log_tags = [ :request_id ]
+  config.log_tags = [:request_id]
 
   # Use a different cache store in production.
   # config.cache_store = :mem_cache_store
@@ -70,8 +70,8 @@ Rails.application.configure do
   # config.action_mailer.raise_delivery_errors = false
 
   config.action_mailer.delivery_method = :sendmail
-  config.action_mailer.default_options = {from: 'no-reply@openfest.org'}
-  config.action_mailer.default_url_options = {host: 'cfp.openfest.org'}
+  config.action_mailer.default_options = {from: "no-reply@openfest.org"}
+  config.action_mailer.default_url_options = {host: "cfp.openfest.org"}
 
   # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
   # the I18n.default_locale when a translation cannot be found).
diff --git a/config/environments/test.rb b/config/environments/test.rb
index eda59e7..d2851b7 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -15,7 +15,7 @@ Rails.application.configure do
   # Configure public file server for tests with Cache-Control for performance.
   config.public_file_server.enabled = true
   config.public_file_server.headers = {
-    'Cache-Control' => "public, max-age=#{1.hour.to_i}"
+    "Cache-Control" => "public, max-age=#{1.hour.to_i}",
   }
 
   # Show full error reports and disable caching.
@@ -39,8 +39,8 @@ Rails.application.configure do
   config.action_mailer.delivery_method = :test
 
   # Use localhost for default host
-  config.action_mailer.default_url_options = {host: 'localhost:3000'}
-  config.action_mailer.default_options = {from: 'no-reply@example.com'}
+  config.action_mailer.default_url_options = {host: "localhost:3000"}
+  config.action_mailer.default_options = {from: "no-reply@example.com"}
   # Print deprecation notices to the stderr.
   config.active_support.deprecation = :stderr
 
diff --git a/config/initializers/assets.rb b/config/initializers/assets.rb
index 390b765..7b3fd91 100644
--- a/config/initializers/assets.rb
+++ b/config/initializers/assets.rb
@@ -1,19 +1,19 @@
 # Be sure to restart your server when you modify this file.
 
 # Version of your assets, change this if you want to expire all your assets.
-Rails.application.config.assets.version = '1.0'
+Rails.application.config.assets.version = "1.0"
 
 # Add additional assets to the asset load path.
 # Rails.application.config.assets.paths << Emoji.images_path
 # Add Yarn node_modules folder to the asset load path.
-Rails.application.config.assets.paths << Rails.root.join('node_modules')
+Rails.application.config.assets.paths << Rails.root.join("node_modules")
 
-Rails.application.config.assets.paths << 'lib/initfest/assets/images'
-Rails.application.config.assets.paths << 'lib/initfest/assets/javascripts'
-Rails.application.config.assets.paths << 'lib/initfest/assets/stylesheets'
+Rails.application.config.assets.paths << "lib/initfest/assets/images"
+Rails.application.config.assets.paths << "lib/initfest/assets/javascripts"
+Rails.application.config.assets.paths << "lib/initfest/assets/stylesheets"
 Rails.application.config.assets.precompile << /\.(?:png|jpg|jpeg|gif)\z/
 
 # Precompile additional assets.
 # application.js, application.css, and all non-JS/CSS in the app/assets
 # folder are already added.
-Rails.application.config.assets.precompile += %w( management/application.css management/application.js )
+Rails.application.config.assets.precompile += %w[management/application.css management/application.js]
diff --git a/config/initializers/devise.rb b/config/initializers/devise.rb
index 9b85273..1c7475b 100644
--- a/config/initializers/devise.rb
+++ b/config/initializers/devise.rb
@@ -12,7 +12,7 @@ Devise.setup do |config|
   # Configure the e-mail address which will be shown in Devise::Mailer,
   # note that it will be overwritten if you use your own mailer class
   # with default "from" parameter.
-  config.mailer_sender = 'no-reply@openfest.org'
+  config.mailer_sender = "no-reply@openfest.org"
 
   # Configure the class responsible to send e-mails.
   # config.mailer = 'Devise::Mailer'
@@ -21,7 +21,7 @@ Devise.setup do |config|
   # Load and configure the ORM. Supports :active_record (default) and
   # :mongoid (bson_ext recommended) by default. Other ORMs may be
   # available as additional gems.
-  require 'devise/orm/active_record'
+  require "devise/orm/active_record"
 
   # ==> Configuration for any authentication mechanism
   # Configure which keys are used when authenticating a user. The default is
diff --git a/config/initializers/session_store.rb b/config/initializers/session_store.rb
index eda06fa..5c534a9 100644
--- a/config/initializers/session_store.rb
+++ b/config/initializers/session_store.rb
@@ -1,3 +1,3 @@
 # Be sure to restart your server when you modify this file.
 
-Rails.application.config.session_store :cookie_store, key: '_clarion_session'
+Rails.application.config.session_store :cookie_store, key: "_clarion_session"
diff --git a/config/initializers/simple_form.rb b/config/initializers/simple_form.rb
index d5492e5..e7f43e0 100644
--- a/config/initializers/simple_form.rb
+++ b/config/initializers/simple_form.rb
@@ -6,7 +6,7 @@ SimpleForm.setup do |config|
   # stack. The options given below are used to wrap the
   # whole input.
   config.wrappers :default, class: :input,
-    hint_class: :field_with_hint, error_class: :field_with_errors do |b|
+                            hint_class: :field_with_hint, error_class: :field_with_errors do |b|
     ## Extensions enabled by default
     # Any of these extensions can be disabled for a
     # given input by passing: `f.input EXTENSION_NAME => false`.
@@ -41,8 +41,8 @@ SimpleForm.setup do |config|
 
     ## Inputs
     b.use :label_input
-    b.use :hint,  wrap_with: { tag: :span, class: :hint }
-    b.use :error, wrap_with: { tag: :span, class: :error }
+    b.use :hint,  wrap_with: {tag: :span, class: :hint}
+    b.use :error, wrap_with: {tag: :span, class: :error}
 
     ## full_messages_for
     # If you want to display the full error message for the attribute, you can
@@ -61,7 +61,7 @@ SimpleForm.setup do |config|
   config.boolean_style = :nested
 
   # Default class for buttons
-  config.button_class = 'btn'
+  config.button_class = "btn"
 
   # Method used to tidy up errors. Specify any Rails Array method.
   # :first lists the first message for each field.
@@ -72,7 +72,7 @@ SimpleForm.setup do |config|
   config.error_notification_tag = :div
 
   # CSS class to add for error notification helper.
-  config.error_notification_class = 'error_notification'
+  config.error_notification_class = "error_notification"
 
   # ID to add for error notification helper.
   # config.error_notification_id = nil
@@ -155,7 +155,7 @@ SimpleForm.setup do |config|
   # config.input_class = nil
 
   # Define the default class of the input wrapper of the boolean input.
-  config.boolean_label_class = 'checkbox'
+  config.boolean_label_class = "checkbox"
 
   # Defines if the default input wrapper class should be included in radio
   # collection wrappers.
diff --git a/config/initializers/simple_form_bootstrap.rb b/config/initializers/simple_form_bootstrap.rb
index ea4a63d..04e5d8a 100644
--- a/config/initializers/simple_form_bootstrap.rb
+++ b/config/initializers/simple_form_bootstrap.rb
@@ -1,125 +1,125 @@
 # Use this setup block to configure all options available in SimpleForm.
 SimpleForm.setup do |config|
-  config.error_notification_class = 'alert alert-danger'
-  config.button_class = 'btn btn-default'
+  config.error_notification_class = "alert alert-danger"
+  config.button_class = "btn btn-default"
   config.boolean_label_class = nil
 
-  config.wrappers :vertical_form, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+  config.wrappers :vertical_form, tag: "div", class: "form-group", error_class: "has-error" do |b|
     b.use :html5
     b.use :placeholder
     b.optional :maxlength
     b.optional :pattern
     b.optional :min_max
     b.optional :readonly
-    b.use :label, class: 'control-label'
+    b.use :label, class: "control-label"
 
-    b.use :input, class: 'form-control'
-    b.use :error, wrap_with: { tag: 'span', class: 'help-block' }
-    b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
+    b.use :input, class: "form-control"
+    b.use :error, wrap_with: {tag: "span", class: "help-block"}
+    b.use :hint,  wrap_with: {tag: "p", class: "help-block"}
   end
 
-  config.wrappers :vertical_file_input, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+  config.wrappers :vertical_file_input, tag: "div", class: "form-group", error_class: "has-error" do |b|
     b.use :html5
     b.use :placeholder
     b.optional :maxlength
     b.optional :readonly
-    b.use :label, class: 'control-label'
+    b.use :label, class: "control-label"
 
     b.use :input
-    b.use :error, wrap_with: { tag: 'span', class: 'help-block' }
-    b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
+    b.use :error, wrap_with: {tag: "span", class: "help-block"}
+    b.use :hint,  wrap_with: {tag: "p", class: "help-block"}
   end
 
-  config.wrappers :vertical_boolean, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+  config.wrappers :vertical_boolean, tag: "div", class: "form-group", error_class: "has-error" do |b|
     b.use :html5
     b.optional :readonly
 
-    b.wrapper tag: 'div', class: 'checkbox' do |ba|
+    b.wrapper tag: "div", class: "checkbox" do |ba|
       ba.use :label_input
     end
 
-    b.use :error, wrap_with: { tag: 'span', class: 'help-block' }
-    b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
+    b.use :error, wrap_with: {tag: "span", class: "help-block"}
+    b.use :hint,  wrap_with: {tag: "p", class: "help-block"}
   end
 
-  config.wrappers :vertical_radio_and_checkboxes, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+  config.wrappers :vertical_radio_and_checkboxes, tag: "div", class: "form-group", error_class: "has-error" do |b|
     b.use :html5
     b.optional :readonly
-    b.use :label, class: 'control-label'
+    b.use :label, class: "control-label"
     b.use :input
-    b.use :error, wrap_with: { tag: 'span', class: 'help-block' }
-    b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
+    b.use :error, wrap_with: {tag: "span", class: "help-block"}
+    b.use :hint,  wrap_with: {tag: "p", class: "help-block"}
   end
 
-  config.wrappers :horizontal_form, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+  config.wrappers :horizontal_form, tag: "div", class: "form-group", error_class: "has-error" do |b|
     b.use :html5
     b.use :placeholder
     b.optional :maxlength
     b.optional :pattern
     b.optional :min_max
     b.optional :readonly
-    b.use :label, class: 'col-sm-3 control-label'
+    b.use :label, class: "col-sm-3 control-label"
 
-    b.wrapper tag: 'div', class: 'col-sm-9' do |ba|
-      ba.use :input, class: 'form-control'
-      ba.use :error, wrap_with: { tag: 'span', class: 'help-block' }
-      ba.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
+    b.wrapper tag: "div", class: "col-sm-9" do |ba|
+      ba.use :input, class: "form-control"
+      ba.use :error, wrap_with: {tag: "span", class: "help-block"}
+      ba.use :hint,  wrap_with: {tag: "p", class: "help-block"}
     end
   end
 
-  config.wrappers :horizontal_file_input, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+  config.wrappers :horizontal_file_input, tag: "div", class: "form-group", error_class: "has-error" do |b|
     b.use :html5
     b.use :placeholder
     b.optional :maxlength
     b.optional :readonly
-    b.use :label, class: 'col-sm-3 control-label'
+    b.use :label, class: "col-sm-3 control-label"
 
-    b.wrapper tag: 'div', class: 'col-sm-9' do |ba|
+    b.wrapper tag: "div", class: "col-sm-9" do |ba|
       ba.use :input
-      ba.use :error, wrap_with: { tag: 'span', class: 'help-block' }
-      ba.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
+      ba.use :error, wrap_with: {tag: "span", class: "help-block"}
+      ba.use :hint,  wrap_with: {tag: "p", class: "help-block"}
     end
   end
 
-  config.wrappers :horizontal_boolean, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+  config.wrappers :horizontal_boolean, tag: "div", class: "form-group", error_class: "has-error" do |b|
     b.use :html5
     b.optional :readonly
 
-    b.wrapper tag: 'div', class: 'col-sm-offset-3 col-sm-9' do |wr|
-      wr.wrapper tag: 'div', class: 'checkbox' do |ba|
-        ba.use :label_input, class: 'col-sm-9'
+    b.wrapper tag: "div", class: "col-sm-offset-3 col-sm-9" do |wr|
+      wr.wrapper tag: "div", class: "checkbox" do |ba|
+        ba.use :label_input, class: "col-sm-9"
       end
 
-      wr.use :error, wrap_with: { tag: 'span', class: 'help-block' }
-      wr.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
+      wr.use :error, wrap_with: {tag: "span", class: "help-block"}
+      wr.use :hint,  wrap_with: {tag: "p", class: "help-block"}
     end
   end
 
-  config.wrappers :horizontal_radio_and_checkboxes, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+  config.wrappers :horizontal_radio_and_checkboxes, tag: "div", class: "form-group", error_class: "has-error" do |b|
     b.use :html5
     b.optional :readonly
 
-    b.use :label, class: 'col-sm-3 control-label'
+    b.use :label, class: "col-sm-3 control-label"
 
-    b.wrapper tag: 'div', class: 'col-sm-9' do |ba|
+    b.wrapper tag: "div", class: "col-sm-9" do |ba|
       ba.use :input
-      ba.use :error, wrap_with: { tag: 'span', class: 'help-block' }
-      ba.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
+      ba.use :error, wrap_with: {tag: "span", class: "help-block"}
+      ba.use :hint,  wrap_with: {tag: "p", class: "help-block"}
     end
   end
 
-  config.wrappers :inline_form, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+  config.wrappers :inline_form, tag: "div", class: "form-group", error_class: "has-error" do |b|
     b.use :html5
     b.use :placeholder
     b.optional :maxlength
     b.optional :pattern
     b.optional :min_max
     b.optional :readonly
-    b.use :label, class: 'sr-only'
+    b.use :label, class: "sr-only"
 
-    b.use :input, class: 'form-control'
-    b.use :error, wrap_with: { tag: 'span', class: 'help-block' }
-    b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
+    b.use :input, class: "form-control"
+    b.use :error, wrap_with: {tag: "span", class: "help-block"}
+    b.use :hint,  wrap_with: {tag: "p", class: "help-block"}
   end
 
   # Wrappers for forms and inputs using the Bootstrap toolkit.
diff --git a/config/routes.rb b/config/routes.rb
index 56de69a..a414264 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,19 +1,19 @@
 Rails.application.routes.draw do
-  devise_for :users, controllers: {registrations: 'registrations', confirmations: 'confirmations'}
+  devise_for :users, controllers: {registrations: "registrations", confirmations: "confirmations"}
 
   scope module: :public do
-    root to: 'home#index'
-    resource :personal_profile, path: 'profile'
+    root to: "home#index"
+    resource :personal_profile, path: "profile"
     resources :events do
-      resources :feedback, controller: 'event_feedbacks', only: [:new, :create]
-      resource :feedback_qr_code, controller: 'event_feedback_qrcodes', only: :show
+      resources :feedback, controller: "event_feedbacks", only: [:new, :create]
+      resource :feedback_qr_code, controller: "event_feedback_qrcodes", only: :show
       member do
         get :confirm
       end
     end
     resources :volunteers
     resources :volunteer_teams, only: [:index]
-    resources :feedback, as: 'conference_feedbacks', controller: 'conference_feedbacks', only: [:new, :create, :index]
+    resources :feedback, as: "conference_feedbacks", controller: "conference_feedbacks", only: [:new, :create, :index]
   end
 
   namespace :api do
@@ -33,7 +33,7 @@ Rails.application.routes.draw do
   end
 
   namespace :management do
-    root to: 'conferences#index'
+    root to: "conferences#index"
 
     resources :conferences do
       member do
diff --git a/config/spring.rb b/config/spring.rb
index c9119b4..9fa7863 100644
--- a/config/spring.rb
+++ b/config/spring.rb
@@ -1,6 +1,6 @@
-%w(
+%w[
   .ruby-version
   .rbenv-vars
   tmp/restart.txt
   tmp/caching-dev.txt
-).each { |path| Spring.watch(path) }
+].each { |path| Spring.watch(path) }
diff --git a/db/migrate/20140728105159_devise_create_users.rb b/db/migrate/20140728105159_devise_create_users.rb
index 71debfd..6003bd1 100644
--- a/db/migrate/20140728105159_devise_create_users.rb
+++ b/db/migrate/20140728105159_devise_create_users.rb
@@ -33,7 +33,7 @@ class DeviseCreateUsers < ActiveRecord::Migration[4.2]
       t.string  :first_name,   null: false
       t.string  :last_name,    null: false
       t.string  :organisation
-      t.boolean :hide_email,   null: false, default: true
+      t.boolean :hide_email, null: false, default: true
       t.string  :photo_url
       t.string  :mobile_phone, null: false
       t.text    :biography
diff --git a/db/migrate/20140810174338_create_events.rb b/db/migrate/20140810174338_create_events.rb
index 94304df..ebb7cf5 100644
--- a/db/migrate/20140810174338_create_events.rb
+++ b/db/migrate/20140810174338_create_events.rb
@@ -5,7 +5,7 @@ class CreateEvents < ActiveRecord::Migration[4.2]
       t.string :subtitle
       t.string :type
       t.integer :length, null: false, default: 45
-      t.string :language, null: false, default: 'bg_BG'
+      t.string :language, null: false, default: "bg_BG"
       t.integer :state
       t.text :abstract, null: false
       t.text :description, null: false
diff --git a/db/migrate/20140901103859_add_translation_tables_to_conferences.rb b/db/migrate/20140901103859_add_translation_tables_to_conferences.rb
index ab2dcbe..1708629 100644
--- a/db/migrate/20140901103859_add_translation_tables_to_conferences.rb
+++ b/db/migrate/20140901103859_add_translation_tables_to_conferences.rb
@@ -1,14 +1,14 @@
 class AddTranslationTablesToConferences < ActiveRecord::Migration[4.2]
   def up
     Conference.create_translation_table!({
-                                     :title => :string,
-                                     :description => :text
-                                   }, {
-                                     :migrate_data => true
-                                   })
+      title: :string,
+      description: :text,
+    }, {
+      migrate_data: true,
+    })
   end
 
   def down
-    Conference.drop_translation_table! :migrate_data => true
+    Conference.drop_translation_table! migrate_data: true
   end
 end
diff --git a/db/migrate/20140906151433_add_translation_tables_to_tracks.rb b/db/migrate/20140906151433_add_translation_tables_to_tracks.rb
index afbb5cd..e8efcde 100644
--- a/db/migrate/20140906151433_add_translation_tables_to_tracks.rb
+++ b/db/migrate/20140906151433_add_translation_tables_to_tracks.rb
@@ -1,11 +1,11 @@
 class AddTranslationTablesToTracks < ActiveRecord::Migration[4.2]
   def up
     Track.create_translation_table!({
-                                      name: :string,
-                                      description: :text
-                                    }, {
-                                      migrate_data: true
-                                    })
+      name: :string,
+      description: :text,
+    }, {
+      migrate_data: true,
+    })
   end
 
   def down
diff --git a/db/migrate/20141010142514_change_event_state_defaults.rb b/db/migrate/20141010142514_change_event_state_defaults.rb
index 82476ce..926d490 100644
--- a/db/migrate/20141010142514_change_event_state_defaults.rb
+++ b/db/migrate/20141010142514_change_event_state_defaults.rb
@@ -1,6 +1,6 @@
 class ChangeEventStateDefaults < ActiveRecord::Migration[4.2]
   def up
-    execute 'UPDATE events SET state = 0'
+    execute "UPDATE events SET state = 0"
     change_column :events, :state, :integer, null: false, default: 0
   end
 
diff --git a/db/migrate/20141105100105_create_propositions.rb b/db/migrate/20141105100105_create_propositions.rb
index 27db085..bbaf339 100644
--- a/db/migrate/20141105100105_create_propositions.rb
+++ b/db/migrate/20141105100105_create_propositions.rb
@@ -3,7 +3,7 @@ class CreatePropositions < ActiveRecord::Migration[4.2]
     create_table :propositions do |t|
       t.references :proposer, index: true
       t.references :proposition_accepting, polymorphic: true
-      t.index [:proposition_accepting_id, :proposition_accepting_type], name: 'proposition_accepting_index'
+      t.index [:proposition_accepting_id, :proposition_accepting_type], name: "proposition_accepting_index"
       t.references :proposable, polymorphic: true, index: true
       t.integer :status
 
diff --git a/db/migrate/20141105100827_create_propositions_for_existing_events.rb b/db/migrate/20141105100827_create_propositions_for_existing_events.rb
index 2f25b13..fd3c5a1 100644
--- a/db/migrate/20141105100827_create_propositions_for_existing_events.rb
+++ b/db/migrate/20141105100827_create_propositions_for_existing_events.rb
@@ -1,15 +1,15 @@
 class CreatePropositionsForExistingEvents < ActiveRecord::Migration[4.2]
   def up
-    events = execute 'SELECT * FROM events'
+    events = execute "SELECT * FROM events"
 
     events.each do |event|
       execute "INSERT INTO propositions (proposer_id, proposition_accepting_id, proposition_accepting_type, proposable_id, proposable_type, status, created_at, updated_at)
-                 VALUES (#{event['user_id']}, #{event['track_id']}, 'Track', #{event['id']}, 'Event', #{event['state']}, '#{event['created_at']}', '#{event['updated_at']}')"
+                 VALUES (#{event["user_id"]}, #{event["track_id"]}, 'Track', #{event["id"]}, 'Event', #{event["state"]}, '#{event["created_at"]}', '#{event["updated_at"]}')"
     end
   end
 
   def down
-    event_ids = execute('SELECT * FROM events').map { |event| event['id'] }
-    execute "DELETE FROM propositions WHERE proposable_id IN (#{event_ids.join(', ')}) AND proposable_type = 'Event'"
+    event_ids = execute("SELECT * FROM events").map { |event| event["id"] }
+    execute "DELETE FROM propositions WHERE proposable_id IN (#{event_ids.join(", ")}) AND proposable_type = 'Event'"
   end
 end
diff --git a/db/migrate/20150416234411_create_event_types_for_all_existing_events.rb b/db/migrate/20150416234411_create_event_types_for_all_existing_events.rb
index 467e24a..656dfb6 100644
--- a/db/migrate/20150416234411_create_event_types_for_all_existing_events.rb
+++ b/db/migrate/20150416234411_create_event_types_for_all_existing_events.rb
@@ -9,10 +9,10 @@ class CreateEventTypesForAllExistingEvents < ActiveRecord::Migration[4.2]
                            GROUP BY type_name, tracks.conference_id;'
 
     event_types.each do |type|
-      event_type = EventType.create! conference_id: type['conference_id'], created_at: type['created_at'], updated_at: type['created_at']
+      event_type = EventType.create! conference_id: type["conference_id"], created_at: type["created_at"], updated_at: type["created_at"]
 
       execute "INSERT INTO event_type_translations (event_type_id, locale, created_at, updated_at, name, description)
-               VALUES (#{event_type.id}, 'en', '#{event_type.created_at}', '#{event_type.created_at}', '#{type['type_name']}', 'None');"
+               VALUES (#{event_type.id}, 'en', '#{event_type.created_at}', '#{event_type.created_at}', '#{type["type_name"]}', 'None');"
     end
   end
 
diff --git a/db/migrate/20150417002233_populate_event_type_of_existing_events.rb b/db/migrate/20150417002233_populate_event_type_of_existing_events.rb
index de1f6e2..27d6a30 100644
--- a/db/migrate/20150417002233_populate_event_type_of_existing_events.rb
+++ b/db/migrate/20150417002233_populate_event_type_of_existing_events.rb
@@ -1,14 +1,14 @@
 class PopulateEventTypeOfExistingEvents < ActiveRecord::Migration[4.2]
   def up
-    event_ids = execute('SELECT id FROM events WHERE type IS NOT NULL;').map { |row| row['id'] };
+    event_ids = execute("SELECT id FROM events WHERE type IS NOT NULL;").map { |row| row["id"] }
 
     event_ids.each do |id|
-      event_type_id = execute("SELECT ett.event_type_id FROM events JOIN event_type_translations AS ett ON events.type = ett.name WHERE events.id = #{id};").first['event_type_id']
-      execute("UPDATE events SET event_type_id = #{event_type_id} WHERE id = #{id}");
+      event_type_id = execute("SELECT ett.event_type_id FROM events JOIN event_type_translations AS ett ON events.type = ett.name WHERE events.id = #{id};").first["event_type_id"]
+      execute("UPDATE events SET event_type_id = #{event_type_id} WHERE id = #{id}")
     end
   end
 
   def down
-    execute("UPDATE events SET event_type_id = NULL");
+    execute("UPDATE events SET event_type_id = NULL")
   end
 end
diff --git a/db/migrate/20150729135818_create_participation_records.rb b/db/migrate/20150729135818_create_participation_records.rb
index 262c35c..74d8c1b 100644
--- a/db/migrate/20150729135818_create_participation_records.rb
+++ b/db/migrate/20150729135818_create_participation_records.rb
@@ -3,13 +3,13 @@ class PersonalProfile < ActiveRecord::Base; end
 
 class CreateParticipationRecords < ActiveRecord::Migration[4.2]
   def up
-    event_to_speaker_profiles = execute 'SELECT * FROM events_speaker_profiles'
+    event_to_speaker_profiles = execute "SELECT * FROM events_speaker_profiles"
 
     event_to_speaker_profiles.each do |event_to_speaker_profile|
-      profile = PersonalProfile.find_by(id: event_to_speaker_profile['speaker_profile_id'])
-      next if not profile
+      profile = PersonalProfile.find_by(id: event_to_speaker_profile["speaker_profile_id"])
+      next unless profile
 
-      Participation.create! event_id: event_to_speaker_profile['event_id'],
+      Participation.create! event_id: event_to_speaker_profile["event_id"],
                             participant_id: profile.user_id,
                             approved: true
     end
diff --git a/db/migrate/20151020071227_add_translations_to_halls.rb b/db/migrate/20151020071227_add_translations_to_halls.rb
index 4523ad5..17da62c 100644
--- a/db/migrate/20151020071227_add_translations_to_halls.rb
+++ b/db/migrate/20151020071227_add_translations_to_halls.rb
@@ -1,13 +1,13 @@
 class AddTranslationsToHalls < ActiveRecord::Migration[4.2]
   def self.up
     Hall.create_translation_table!({
-      :name => :string
+      name: :string,
     }, {
-      :migrate_data => true
+      migrate_data: true,
     })
   end
 
   def self.down
-    Hall.drop_translation_table! :migrate_data => true
+    Hall.drop_translation_table! migrate_data: true
   end
 end
diff --git a/db/migrate/20151021183039_create_join_table_volunteer_volunteer_team.rb b/db/migrate/20151021183039_create_join_table_volunteer_volunteer_team.rb
index dee31ed..b4932a7 100644
--- a/db/migrate/20151021183039_create_join_table_volunteer_volunteer_team.rb
+++ b/db/migrate/20151021183039_create_join_table_volunteer_volunteer_team.rb
@@ -1,8 +1,8 @@
 class CreateJoinTableVolunteerVolunteerTeam < ActiveRecord::Migration[4.2]
   def change
     create_join_table :volunteers, :volunteer_teams do |t|
-      t.index [:volunteer_id, :volunteer_team_id], name: 'volunteer_id_volunteer_team_id'
-      t.index [:volunteer_team_id, :volunteer_id], name: 'volunteer_team_id_volunteer_id'
+      t.index [:volunteer_id, :volunteer_team_id], name: "volunteer_id_volunteer_team_id"
+      t.index [:volunteer_team_id, :volunteer_id], name: "volunteer_team_id_volunteer_id"
     end
   end
 end
diff --git a/db/migrate/20161011005420_add_descriptions_for_all_events.rb b/db/migrate/20161011005420_add_descriptions_for_all_events.rb
index 50d1723..d5f02ba 100644
--- a/db/migrate/20161011005420_add_descriptions_for_all_events.rb
+++ b/db/migrate/20161011005420_add_descriptions_for_all_events.rb
@@ -3,7 +3,7 @@ end
 
 class AddDescriptionsForAllEvents < ActiveRecord::Migration[4.2]
   def up
-    Event.where(description: [nil, '']).update_all(description: 'n/a')
+    Event.where(description: [nil, ""]).update_all(description: "n/a")
   end
 
   def down
diff --git a/db/migrate/20161015023007_add_participants_view.rb b/db/migrate/20161015023007_add_participants_view.rb
index 4ab3db5..4623d46 100644
--- a/db/migrate/20161015023007_add_participants_view.rb
+++ b/db/migrate/20161015023007_add_participants_view.rb
@@ -1,16 +1,16 @@
-PARTICIPANTS_SQL = <<EOS
-CREATE VIEW "participants" AS
-SELECT "users"."id" AS "participant_id",
-       "users"."email" AS personal_email,
-       "users"."language" AS language,
-       "participations"."id" AS "participation_id",
-       "personal_profiles"."id" AS "personal_profile_id",
-       "personal_profiles".* FROM "users"
-INNER JOIN "participations"    ON "users"."id" = "participations"."participant_id"
-INNER JOIN "events"            ON "events"."id" = "participations"."event_id"
-INNER JOIN "conferences"       ON "events"."conference_id" = "conferences"."id"
-LEFT JOIN "personal_profiles"  ON "personal_profiles"."conference_id" = "events"."conference_id"
-                              AND "personal_profiles"."user_id" = "users"."id";
+PARTICIPANTS_SQL = <<~EOS
+  CREATE VIEW "participants" AS
+  SELECT "users"."id" AS "participant_id",
+         "users"."email" AS personal_email,
+         "users"."language" AS language,
+         "participations"."id" AS "participation_id",
+         "personal_profiles"."id" AS "personal_profile_id",
+         "personal_profiles".* FROM "users"
+  INNER JOIN "participations"    ON "users"."id" = "participations"."participant_id"
+  INNER JOIN "events"            ON "events"."id" = "participations"."event_id"
+  INNER JOIN "conferences"       ON "events"."conference_id" = "conferences"."id"
+  LEFT JOIN "personal_profiles"  ON "personal_profiles"."conference_id" = "events"."conference_id"
+                                AND "personal_profiles"."user_id" = "users"."id";
 EOS
 
 class AddParticipantsView < ActiveRecord::Migration[4.2]
diff --git a/db/seeds.rb b/db/seeds.rb
index 36330fd..3af6183 100644
--- a/db/seeds.rb
+++ b/db/seeds.rb
@@ -5,8 +5,8 @@
 #
 #   cities = City.create([{ name: 'Chicago' }, { name: 'Copenhagen' }])
 #   Mayor.create(name: 'Emanuel', city: cities.first
-User.create(email: 'foo@example.com',
-            password: '123qweASD',
-            password_confirmation: '123qweASD',
+User.create(email: "foo@example.com",
+            password: "123qweASD",
+            password_confirmation: "123qweASD",
             confirmed_at: Time.current,
             admin: true)
diff --git a/lib/tasks/backup.rake b/lib/tasks/backup.rake
index 2e67d87..3953d1b 100644
--- a/lib/tasks/backup.rake
+++ b/lib/tasks/backup.rake
@@ -7,7 +7,7 @@ task :backup, [:destination] => :environment do |t, args|
   silent = Rake.application.options.silent
   puts "Backing up '#{conf[:database]}' into: #{args.destination}" unless silent
   if system(cmd)
-    puts 'Backup completed.' unless silent
+    puts "Backup completed." unless silent
   else
     puts "Backup failed!\nCommand exit status: #{$?}\nCommand was: #{cmd}"
   end
diff --git a/lib/tasks/bootstrap.rake b/lib/tasks/bootstrap.rake
index 94ae034..7754978 100644
--- a/lib/tasks/bootstrap.rake
+++ b/lib/tasks/bootstrap.rake
@@ -1,34 +1,34 @@
-require 'fileutils'
-require 'yaml'
-require 'securerandom'
+require "fileutils"
+require "yaml"
+require "securerandom"
 
 namespace :bootstrap do
-  desc 'Copy over initial db config'
+  desc "Copy over initial db config"
   task :db_config do
-    example_config_file = File.join(Rails.root, 'config', 'database.yml.example')
-    new_config_file = File.join(Rails.root, 'config', 'database.yml')
+    example_config_file = File.join(Rails.root, "config", "database.yml.example")
+    new_config_file = File.join(Rails.root, "config", "database.yml")
     FileUtils.cp example_config_file, new_config_file
   end
 
-  desc 'Generate new secret tokens'
+  desc "Generate new secret tokens"
   task :secret_tokens do
-    secret_tokens_file = File.join Rails.root, 'config', 'secrets.yml'
+    secret_tokens_file = File.join Rails.root, "config", "secrets.yml"
 
     secrets = {
-      'development' => {'secret_key_base' => SecureRandom.hex(64)},
-      'test'        => {'secret_key_base' => SecureRandom.hex(64)},
-      'production'  => {'secret_key_base' => '<%= ENV["SECRET_KEY_BASE"] %>'}
+      "development" => {"secret_key_base" => SecureRandom.hex(64)},
+      "test" => {"secret_key_base" => SecureRandom.hex(64)},
+      "production" => {"secret_key_base" => '<%= ENV["SECRET_KEY_BASE"] %>'},
     }
 
-    File.open(secret_tokens_file, 'w') do |f|
+    File.open(secret_tokens_file, "w") do |f|
       f.puts secrets.to_yaml
     end
   end
 end
 
-desc 'Perform initial setup of the application'
-task bootstrap: ['bootstrap:secret_tokens',
-                 'bootstrap:db_config',
-                 'db:create',
-                 'db:migrate',
-                 'db:test:prepare']
+desc "Perform initial setup of the application"
+task bootstrap: ["bootstrap:secret_tokens",
+                 "bootstrap:db_config",
+                 "db:create",
+                 "db:migrate",
+                 "db:test:prepare",]
diff --git a/spec/factories/conferences.rb b/spec/factories/conferences.rb
index 52f1be3..c244c2e 100644
--- a/spec/factories/conferences.rb
+++ b/spec/factories/conferences.rb
@@ -3,11 +3,11 @@
 FactoryBot.define do
   factory :conference do
     sequence(:title) { |n| "Conference-#{n}" }
-    email { 'foo@example.com' }
-    description { 'MyText' }
-    start_date { '2014-07-29 21:29:13' }
-    end_date { '2014-07-31 21:29:13' }
-    planned_cfp_end_date { '2014-07-28' }
+    email { "foo@example.com" }
+    description { "MyText" }
+    start_date { "2014-07-29 21:29:13" }
+    end_date { "2014-07-31 21:29:13" }
+    planned_cfp_end_date { "2014-07-28" }
 
     factory :past_conference do
       start_date { Date.today - 10.days }
diff --git a/spec/factories/event_types.rb b/spec/factories/event_types.rb
index b3f3ba2..223d22e 100644
--- a/spec/factories/event_types.rb
+++ b/spec/factories/event_types.rb
@@ -1,9 +1,9 @@
 FactoryBot.define do
   factory :event_type do
     name { |n| "Track #{n}" }
-    description { 'MyText' }
+    description { "MyText" }
     conference
-    minimum_length { '45' }
-    maximum_length { '60' }
+    minimum_length { "45" }
+    maximum_length { "60" }
   end
 end
diff --git a/spec/factories/events.rb b/spec/factories/events.rb
index 58eacf6..3afc64d 100644
--- a/spec/factories/events.rb
+++ b/spec/factories/events.rb
@@ -2,8 +2,8 @@ FactoryBot.define do
   factory :event do
     title { |n| "Event #{n}" }
     length { 60 }
-    abstract { 'foo' }
-    description { 'foo' }
+    abstract { "foo" }
+    description { "foo" }
     conference
     language { :bg }
     after(:build) do |event, evaluator|
diff --git a/spec/factories/personal_profile.rb b/spec/factories/personal_profile.rb
index 8084392..565dfe7 100644
--- a/spec/factories/personal_profile.rb
+++ b/spec/factories/personal_profile.rb
@@ -1,14 +1,14 @@
 FactoryBot.define do
   factory :personal_profile do
-    first_name { 'Foo' }
-    last_name { 'Bar' }
-    organisation { 'foo inc.' }
-    public_email { 'foo@example.com' }
-    picture { Rack::Test::UploadedFile.new(File.join(Rails.root, 'spec', 'support', 'picture.jpg')) }
-    mobile_phone { '+359883444555' }
-    biography { 'Just a bio' }
-    github { 'foobar' }
-    twitter { 'foobar' }
+    first_name { "Foo" }
+    last_name { "Bar" }
+    organisation { "foo inc." }
+    public_email { "foo@example.com" }
+    picture { Rack::Test::UploadedFile.new(File.join(Rails.root, "spec", "support", "picture.jpg")) }
+    mobile_phone { "+359883444555" }
+    biography { "Just a bio" }
+    github { "foobar" }
+    twitter { "foobar" }
     user
     conference
   end
diff --git a/spec/factories/tracks.rb b/spec/factories/tracks.rb
index f91cf4f..87e5372 100644
--- a/spec/factories/tracks.rb
+++ b/spec/factories/tracks.rb
@@ -3,8 +3,8 @@
 FactoryBot.define do
   factory :track do
     name { |n| "Track#{n}" }
-    color { '#000000' }
-    description { 'Some description' }
+    color { "#000000" }
+    description { "Some description" }
     conference
   end
 end
diff --git a/spec/factories/users.rb b/spec/factories/users.rb
index 32299b4..218f1ee 100644
--- a/spec/factories/users.rb
+++ b/spec/factories/users.rb
@@ -4,8 +4,8 @@ FactoryBot.define do
   sequence(:email) { |n| "user-#{n}@example.org" }
 
   factory :user do
-    password { 'password' }
-    password_confirmation { 'password' }
+    password { "password" }
+    password_confirmation { "password" }
     confirmed_at { Time.now - 15.minutes }
     email
 
diff --git a/spec/features/call_for_papers_spec.rb b/spec/features/call_for_papers_spec.rb
index 8dc9709..fb35b0e 100644
--- a/spec/features/call_for_papers_spec.rb
+++ b/spec/features/call_for_papers_spec.rb
@@ -1,6 +1,6 @@
 require "rails_helper"
 
-feature 'Call for papers' do
+feature "Call for papers" do
   before do
     Rails.application.load_seed
   end
@@ -11,21 +11,21 @@ feature 'Call for papers' do
     sign_out
 
     visit root_path
-    click_on I18n.t('views.welcome.submit_event', event_type: Conference.first.event_types.first.name.try(:mb_chars).try(:downcase))
+    click_on I18n.t("views.welcome.submit_event", event_type: Conference.first.event_types.first.name.try(:mb_chars).try(:downcase))
     click_on I18n.t(:registration)
 
     register_a_new_user(false)
 
     submit_an_event_proposition
 
-    expect(page).to have_content I18n.t('views.events.event_successfully_created', event_type: Event.last.event_type.name.mb_chars.downcase)
+    expect(page).to have_content I18n.t("views.events.event_successfully_created", event_type: Event.last.event_type.name.mb_chars.downcase)
     expect(page).to have_content I18n.t(:please_fill_in_your_speaker_profile)
 
     fill_in_personal_profile
 
-    expect(page).to have_content I18n.t('views.personal_profiles.successfully_created')
+    expect(page).to have_content I18n.t("views.personal_profiles.successfully_created")
 
-    click_on I18n.t('views.navigation.my_submissions')
+    click_on I18n.t("views.navigation.my_submissions")
 
     expect(page).to have_content(Event.last.event_type.name + ' "This is just a sample title of an event"')
 
@@ -41,7 +41,7 @@ feature 'Call for papers' do
       sign_out
 
       visit root_path
-      click_on I18n.t('views.welcome.submit_event', event_type: Conference.first.event_types.first.name.try(:mb_chars).try(:downcase))
+      click_on I18n.t("views.welcome.submit_event", event_type: Conference.first.event_types.first.name.try(:mb_chars).try(:downcase))
       click_on I18n.t(:registration)
 
       register_a_new_user(false)
@@ -57,17 +57,17 @@ feature 'Call for papers' do
     sign_out
 
     visit root_path
-    click_on I18n.t('views.welcome.submit_event', event_type: Conference.first.event_types.first.name.try(:mb_chars).try(:downcase))
+    click_on I18n.t("views.welcome.submit_event", event_type: Conference.first.event_types.first.name.try(:mb_chars).try(:downcase))
 
     sign_in_as_an_existing_user(false)
 
     submit_an_event_proposition(false)
     expect(page).to have_content I18n.t(:please_fill_in_your_speaker_profile)
-    click_on I18n.t('helpers.submit.create', model: PersonalProfile.model_name.human)
+    click_on I18n.t("helpers.submit.create", model: PersonalProfile.model_name.human)
 
-    expect(page).to have_content I18n.t('views.personal_profiles.successfully_created')
+    expect(page).to have_content I18n.t("views.personal_profiles.successfully_created")
 
-    click_on I18n.t('views.navigation.my_submissions')
+    click_on I18n.t("views.navigation.my_submissions")
 
     expect(page).to have_content(Event.last.event_type.name + ' "This is just a sample title of an event"')
 
@@ -76,7 +76,6 @@ feature 'Call for papers' do
     verify_the_event_is_submitted
   end
 
-
   scenario "A returning user resets their password and submits an event proposition" do
     time_travel_to(2.years.ago) do
       sign_in_as_admin
@@ -84,7 +83,7 @@ feature 'Call for papers' do
       sign_out
 
       visit root_path
-      click_on I18n.t('views.welcome.submit_event', event_type: Conference.first.event_types.first.name.try(:mb_chars).try(:downcase))
+      click_on I18n.t("views.welcome.submit_event", event_type: Conference.first.event_types.first.name.try(:mb_chars).try(:downcase))
       click_on I18n.t(:registration)
 
       register_a_new_user(false)
@@ -100,25 +99,25 @@ feature 'Call for papers' do
     sign_out
 
     visit root_path
-    click_on I18n.t('views.welcome.submit_event', event_type: Conference.first.event_types.first.name.try(:mb_chars).try(:downcase))
+    click_on I18n.t("views.welcome.submit_event", event_type: Conference.first.event_types.first.name.try(:mb_chars).try(:downcase))
 
-    click_on I18n.t('lostpass')
-    fill_in User.human_attribute_name(:email), with: 'bar@example.com'
+    click_on I18n.t("lostpass")
+    fill_in User.human_attribute_name(:email), with: "bar@example.com"
     click_on I18n.t(:send_lostpass_instructions)
-    expect(page).to have_content I18n.t('devise.passwords.send_instructions')
+    expect(page).to have_content I18n.t("devise.passwords.send_instructions")
     visit ActionMailer::Base.deliveries.last.body.raw_source.match(/https?:\/\/.*?(\/.*\w)/)[1]
 
-    fill_in User.human_attribute_name(:password), with: 'foobarbaz'
-    fill_in User.human_attribute_name(:password_confirmation), with: 'foobarbaz'
+    fill_in User.human_attribute_name(:password), with: "foobarbaz"
+    fill_in User.human_attribute_name(:password_confirmation), with: "foobarbaz"
     click_on I18n.t(:change_pass)
 
     submit_an_event_proposition(false)
     expect(page).to have_content I18n.t(:please_fill_in_your_speaker_profile)
-    click_on I18n.t('helpers.submit.create', model: PersonalProfile.model_name.human)
+    click_on I18n.t("helpers.submit.create", model: PersonalProfile.model_name.human)
 
-    expect(page).to have_content I18n.t('views.personal_profiles.successfully_created')
+    expect(page).to have_content I18n.t("views.personal_profiles.successfully_created")
 
-    click_on I18n.t('views.navigation.my_submissions')
+    click_on I18n.t("views.navigation.my_submissions")
 
     expect(page).to have_content(Event.last.event_type.name + ' "This is just a sample title of an event"')
 
diff --git a/spec/features/landing_page_spec.rb b/spec/features/landing_page_spec.rb
index 195cb33..4255680 100644
--- a/spec/features/landing_page_spec.rb
+++ b/spec/features/landing_page_spec.rb
@@ -1,6 +1,6 @@
 require "rails_helper"
 
-feature 'Landing page' do
+feature "Landing page" do
   before do
     Rails.application.load_seed
     sign_in_as_admin
@@ -8,9 +8,8 @@ feature 'Landing page' do
     sign_out
   end
 
-  it 'displays information about the conference' do
+  it "displays information about the conference" do
     visit root_path
     expect(page).to have_content I18n.t(:home_title, conference: "FooConf #{1.year.from_now.year}")
   end
 end
-
diff --git a/spec/features/management_interface_spec.rb b/spec/features/management_interface_spec.rb
index 94ae7c7..533db9b 100644
--- a/spec/features/management_interface_spec.rb
+++ b/spec/features/management_interface_spec.rb
@@ -1,11 +1,11 @@
 require "rails_helper"
 
-feature 'Conference management' do
+feature "Conference management" do
   before do
     Rails.application.load_seed
   end
 
-  scenario 'Creating a new conference' do
+  scenario "Creating a new conference" do
     sign_in_as_admin
     visit management_root_path
     expect(page).to_not have_content "FooConf"
@@ -14,104 +14,104 @@ feature 'Conference management' do
     expect(page).to have_content "FooConf"
   end
 
-  scenario 'Enabling the call for papers of a conference' do
+  scenario "Enabling the call for papers of a conference" do
     sign_in_as_admin
     create_new_conference
     visit root_path
-    expect(page).to have_link I18n.t('views.welcome.submit_event', event_type: '')
+    expect(page).to have_link I18n.t("views.welcome.submit_event", event_type: "")
     visit management_root_path
     click_on_first_conference_in_management_root
-    click_on I18n.t('management.conferences.show.cfp_status')
-    expect(page).to_not have_link I18n.t('views.welcome.submit_event', event_type: '')
+    click_on I18n.t("management.conferences.show.cfp_status")
+    expect(page).to_not have_link I18n.t("views.welcome.submit_event", event_type: "")
   end
 
-  scenario 'Editing an existing conference' do
+  scenario "Editing an existing conference" do
     sign_in_as_admin
     create_new_conference
-    click_on I18n.t('actions.edit.button', model: Conference.model_name.human)
-    fill_in Conference.human_attribute_name(:title), with: 'FooBarBazConf'
-    page.find('.btn.btn-primary').click
-    expect(page).to have_content 'FooBarBazConf'
+    click_on I18n.t("actions.edit.button", model: Conference.model_name.human)
+    fill_in Conference.human_attribute_name(:title), with: "FooBarBazConf"
+    page.find(".btn.btn-primary").click
+    expect(page).to have_content "FooBarBazConf"
   end
 
-  scenario 'Deleting a newly created conference', js: true do
+  scenario "Deleting a newly created conference", js: true do
     sign_in_as_admin
-    create_new_conference(host_name: '127.0.0.1')
-    click_on 'Clarion'
-    expect(page).to have_content 'FooConf'
+    create_new_conference(host_name: "127.0.0.1")
+    click_on "Clarion"
+    expect(page).to have_content "FooConf"
     click_on_first_conference_in_management_root
     accept_confirm do
-      click_on I18n.t('actions.destroy.button', model: Conference.model_name.human)
+      click_on I18n.t("actions.destroy.button", model: Conference.model_name.human)
     end
     visit management_root_path
-    expect(page).to_not have_content 'FooConf'
+    expect(page).to_not have_content "FooConf"
   end
 
-  scenario 'Reviewing an event' do
+  scenario "Reviewing an event" do
     sign_in_as_admin
     create_new_conference
     submit_an_event_proposition(true)
     visit management_root_path
     click_on_first_conference_in_management_root
-    click_on I18n.t('activerecord.models.event', count: 2).capitalize
-    click_on I18n.t('actions.view.button', model: Event.model_name.human)
-    expect(page).to have_content('This is just a sample title of an event')
+    click_on I18n.t("activerecord.models.event", count: 2).capitalize
+    click_on I18n.t("actions.view.button", model: Event.model_name.human)
+    expect(page).to have_content("This is just a sample title of an event")
   end
 
-  scenario 'Editing an event' do
+  scenario "Editing an event" do
     sign_in_as_admin
     create_new_conference
     submit_an_event_proposition(true)
     visit management_root_path
     click_on_first_conference_in_management_root
-    click_on I18n.t('activerecord.models.event', count: 2).capitalize
-    expect(page).to have_content('This is just a sample title of an event')
-    click_on I18n.t('actions.edit.button', model: Event.model_name.human)
-    fill_in Event.human_attribute_name(:title), with: 'This is just a sample edited title of an event'
-    click_on I18n.t('helpers.submit.event.update')
-    expect(page).to have_content I18n.t('management.events.update.event_successfully_updated')
-    expect(page).to have_content 'This is just a sample edited title of an event'
+    click_on I18n.t("activerecord.models.event", count: 2).capitalize
+    expect(page).to have_content("This is just a sample title of an event")
+    click_on I18n.t("actions.edit.button", model: Event.model_name.human)
+    fill_in Event.human_attribute_name(:title), with: "This is just a sample edited title of an event"
+    click_on I18n.t("helpers.submit.event.update")
+    expect(page).to have_content I18n.t("management.events.update.event_successfully_updated")
+    expect(page).to have_content "This is just a sample edited title of an event"
   end
 
-  scenario 'Approving an event from its detailed view' do
+  scenario "Approving an event from its detailed view" do
     sign_in_as_admin
     create_new_conference
     submit_an_event_proposition(true)
     visit management_root_path
     click_on_first_conference_in_management_root
-    click_on I18n.t('activerecord.models.event', count: 2).capitalize
+    click_on I18n.t("activerecord.models.event", count: 2).capitalize
     expect(page).to_not have_button I18n.t("status.approved")
-    click_on I18n.t('actions.view.button', model: Event.model_name.human)
+    click_on I18n.t("actions.view.button", model: Event.model_name.human)
     click_on I18n.t("status.undecided")
     click_on I18n.t("status.approved")
-    click_on I18n.t('activerecord.models.event', count: 2).capitalize
+    click_on I18n.t("activerecord.models.event", count: 2).capitalize
     expect(page).to have_button I18n.t("status.approved")
   end
 
-  scenario 'Approving an event from the events index' do
+  scenario "Approving an event from the events index" do
     sign_in_as_admin
     create_new_conference
     submit_an_event_proposition(true)
     visit management_root_path
     click_on_first_conference_in_management_root
-    click_on I18n.t('activerecord.models.event', count: 2).capitalize
+    click_on I18n.t("activerecord.models.event", count: 2).capitalize
     expect(page).to_not have_button I18n.t("status.approved")
     click_on I18n.t("status.undecided")
     click_on I18n.t("status.approved")
     expect(page).to have_button I18n.t("status.approved")
   end
 
-  scenario 'Creating a profile for a submitter' do
+  scenario "Creating a profile for a submitter" do
     sign_in_as_admin
     create_new_conference
     submit_an_event_proposition(true)
     visit management_root_path
     click_on_first_conference_in_management_root
-    click_on I18n.t('activerecord.models.personal_profile', count: 2).capitalize
-    click_on I18n.t('actions.create.title', model: PersonalProfile.model_name.human)
+    click_on I18n.t("activerecord.models.personal_profile", count: 2).capitalize
+    click_on I18n.t("actions.create.title", model: PersonalProfile.model_name.human)
     fill_in_personal_profile
-    expect(page).to have_content I18n.t('management.personal_profiles.create.successfully_created')
-    expect(page).to have_content 'Foo Bar'
+    expect(page).to have_content I18n.t("management.personal_profiles.create.successfully_created")
+    expect(page).to have_content "Foo Bar"
   end
 
   scenario "Cloning the last profile of a submitter that did not update it when they submitted" do
@@ -121,7 +121,7 @@ feature 'Conference management' do
       sign_out
 
       visit root_path
-      click_on I18n.t('views.welcome.submit_event', event_type: Conference.first.event_types.first.name.downcase)
+      click_on I18n.t("views.welcome.submit_event", event_type: Conference.first.event_types.first.name.downcase)
       click_on I18n.t(:registration)
 
       register_a_new_user(false)
@@ -137,7 +137,7 @@ feature 'Conference management' do
     sign_out
 
     visit root_path
-    click_on I18n.t('views.welcome.submit_event', event_type: Conference.first.event_types.first.name.downcase)
+    click_on I18n.t("views.welcome.submit_event", event_type: Conference.first.event_types.first.name.downcase)
 
     sign_in_as_an_existing_user(false)
 
@@ -146,12 +146,11 @@ feature 'Conference management' do
     sign_out
 
     verify_the_event_is_submitted
-    click_on I18n.t('activerecord.models.personal_profile', count: 2).capitalize
-    expect(page).to have_text(I18n.t('management.personal_profiles.index.no_profile'))
-    click_on I18n.t('actions.clone.title', model: PersonalProfile.model_name.human)
-    expect(page).to have_text(I18n.t('management.personal_profiles.create.successfully_created'))
-    click_on I18n.t('activerecord.models.personal_profile', count: 2).capitalize
-    expect(page).to_not have_text(I18n.t('management.personal_profiles.index.no_profile'))
+    click_on I18n.t("activerecord.models.personal_profile", count: 2).capitalize
+    expect(page).to have_text(I18n.t("management.personal_profiles.index.no_profile"))
+    click_on I18n.t("actions.clone.title", model: PersonalProfile.model_name.human)
+    expect(page).to have_text(I18n.t("management.personal_profiles.create.successfully_created"))
+    click_on I18n.t("activerecord.models.personal_profile", count: 2).capitalize
+    expect(page).to_not have_text(I18n.t("management.personal_profiles.index.no_profile"))
   end
-
 end
diff --git a/spec/features/volunteership_spec.rb b/spec/features/volunteership_spec.rb
index e6c4037..9094c24 100644
--- a/spec/features/volunteership_spec.rb
+++ b/spec/features/volunteership_spec.rb
@@ -1,6 +1,6 @@
 require "rails_helper"
 
-feature 'Volunteering' do
+feature "Volunteering" do
   before do
     Rails.application.load_seed
     sign_in_as_admin
@@ -8,16 +8,16 @@ feature 'Volunteering' do
     sign_out
   end
 
-  scenario 'A user applies to be a volunteer for the upcoming conference' do
+  scenario "A user applies to be a volunteer for the upcoming conference" do
     visit root_path
-    click_on I18n.t('views.volunteers.apply')
+    click_on I18n.t("views.volunteers.apply")
 
     fill_in_volunteer_profile
-    expect(page).to have_content I18n.t('views.volunteers.successful_application')
+    expect(page).to have_content I18n.t("views.volunteers.successful_application")
 
     sign_in_as_admin
     click_on_first_conference_in_management_root
-    click_on I18n.t('activerecord.models.volunteership', count: 2).capitalize
-    expect(page).to have_content 'Volunteer Foo'
+    click_on I18n.t("activerecord.models.volunteership", count: 2).capitalize
+    expect(page).to have_content "Volunteer Foo"
   end
 end
diff --git a/spec/models/call_for_participation_spec.rb b/spec/models/call_for_participation_spec.rb
index 80594fb..a94dc22 100644
--- a/spec/models/call_for_participation_spec.rb
+++ b/spec/models/call_for_participation_spec.rb
@@ -1,70 +1,70 @@
-require 'rails_helper'
+require "rails_helper"
 
 RSpec.describe CallForParticipation, type: :model do
   let(:conference) { create :conference }
   subject(:cfp) { build :call_for_participation, conference_id: conference.id }
 
-  it 'belongs to a conference' do
+  it "belongs to a conference" do
     conference = create :conference
     cfp = create(:call_for_participation, conference_id: conference.id)
     expect(CallForParticipation.find(cfp.id).conference).to eq conference
   end
 
-  describe '#open?' do
-    it 'returns true when the CFP has an opens_at date in the past' do
+  describe "#open?" do
+    it "returns true when the CFP has an opens_at date in the past" do
       cfp.opens_at = 10.minutes.ago
 
       expect(cfp.open?).to be true
     end
 
-    it 'returns false when the CFP has no opens_at date' do
+    it "returns false when the CFP has no opens_at date" do
       cfp.opens_at = nil
 
       expect(cfp.open?).to be false
     end
 
-    it 'returns false when the CFP has an opens_at date in the future' do
+    it "returns false when the CFP has an opens_at date in the future" do
       cfp.opens_at = 10.minutes.from_now
 
       expect(cfp.open?).to be false
     end
   end
 
-  describe '#closed?' do
-    it 'returns true when the CFP has a closes_at date in the past' do
+  describe "#closed?" do
+    it "returns true when the CFP has a closes_at date in the past" do
       cfp.closes_at = 10.minutes.ago
 
       expect(cfp.closed?).to be true
     end
 
-    it 'returns false when the CFP has no closes_at date' do
+    it "returns false when the CFP has no closes_at date" do
       cfp.closes_at = nil
 
       expect(cfp.closed?).to be false
     end
 
-    it 'returns false when the CFP has a closes_at date in the future' do
+    it "returns false when the CFP has a closes_at date in the future" do
       cfp.closes_at = 10.minutes.from_now
 
       expect(cfp.closed?).to be false
     end
   end
 
-  describe '#in_progress?' do
-    it 'returns true when the CFP has been opened and has not been closed' do
+  describe "#in_progress?" do
+    it "returns true when the CFP has been opened and has not been closed" do
       expect(cfp).to receive(:open?) { true }
       expect(cfp).to receive(:closed?) { false }
 
       expect(cfp.in_progress?).to be true
     end
 
-    it 'returns false when the CFP has not been opened' do
+    it "returns false when the CFP has not been opened" do
       expect(cfp).to receive(:open?) { false }
 
       expect(cfp.in_progress?).to be false
     end
 
-    it 'returns false when the CFP has been closed' do
+    it "returns false when the CFP has been closed" do
       expect(cfp).to receive(:open?) { true }
       expect(cfp).to receive(:closed?) { true }
 
@@ -72,32 +72,32 @@ RSpec.describe CallForParticipation, type: :model do
     end
   end
 
-  describe '#open!' do
-    it 'changes the status of the CFP to open' do
+  describe "#open!" do
+    it "changes the status of the CFP to open" do
       expect { cfp.open! }.to change { cfp.open? }.from(false).to(true)
     end
 
-    it 'does not change the open time of the CFP when it has already been set' do
+    it "does not change the open time of the CFP when it has already been set" do
       cfp.opens_at = 10.minutes.ago
       expect { cfp.open! }.to_not change { cfp.opens_at }
     end
 
-    it 'unsets the close time of the CFP' do
+    it "unsets the close time of the CFP" do
       cfp.closes_at = 10.minutes.ago
       expect { cfp.open! }.to change { cfp.closes_at }.to(nil)
     end
 
-    it 'saves the record' do
+    it "saves the record" do
       expect { cfp.open! }.to change { cfp.persisted? }.from(false).to(true)
     end
   end
 
-  describe '#close!' do
-    it 'changes the status of the CFP to closed' do
+  describe "#close!" do
+    it "changes the status of the CFP to closed" do
       expect { cfp.close! }.to change { cfp.closed? }.from(false).to(true)
     end
 
-    it 'saves the record' do
+    it "saves the record" do
       expect { cfp.close! }.to change { cfp.persisted? }.from(false).to(true)
     end
   end
diff --git a/spec/models/conference_spec.rb b/spec/models/conference_spec.rb
index 1a9df0a..e2e13e8 100644
--- a/spec/models/conference_spec.rb
+++ b/spec/models/conference_spec.rb
@@ -1,57 +1,57 @@
-require 'rails_helper'
+require "rails_helper"
 
-RSpec.describe Conference, :type => :model do
-  describe 'title' do
-    it 'must not be blank' do
-      expect(build(:conference, title: '')).to have_error_on :title
+RSpec.describe Conference, type: :model do
+  describe "title" do
+    it "must not be blank" do
+      expect(build(:conference, title: "")).to have_error_on :title
     end
 
-    it 'must be unique' do
-      create :conference, title: 'ExampleConf'
-      expect(build(:conference, title: 'ExampleConf')).to have_error_on :title
+    it "must be unique" do
+      create :conference, title: "ExampleConf"
+      expect(build(:conference, title: "ExampleConf")).to have_error_on :title
     end
 
-    it 'must be translatable' do
+    it "must be translatable" do
       conference = build(:conference)
       expect(conference).to have_translatable :title
     end
   end
 
-  describe 'email' do
-    it 'must be present' do
-      expect(build(:conference, email: '')).to have_error_on :email
+  describe "email" do
+    it "must be present" do
+      expect(build(:conference, email: "")).to have_error_on :email
     end
 
-    it 'can contain exatly one @' do
-      expect(build(:conference, email: 'test@@example.com')).to have_error_on :email
-      expect(build(:conference, email: 'test@example.com')).to_not have_error_on :email
-      expect(build(:conference, email: 'testexample.com')).to have_error_on :email
+    it "can contain exatly one @" do
+      expect(build(:conference, email: "test@@example.com")).to have_error_on :email
+      expect(build(:conference, email: "test@example.com")).to_not have_error_on :email
+      expect(build(:conference, email: "testexample.com")).to have_error_on :email
     end
   end
 
-  describe 'description' do
-    it 'must be present' do
-      expect(build(:conference, description: '')).to have_error_on :description
+  describe "description" do
+    it "must be present" do
+      expect(build(:conference, description: "")).to have_error_on :description
     end
 
-    it 'must be translatable' do
+    it "must be translatable" do
       expect(build(:conference)).to have_translatable :description
     end
   end
 
-  it 'is invalid without a start date' do
+  it "is invalid without a start date" do
     expect(build(:conference, start_date: nil)).to have_error_on :start_date
   end
 
-  it 'is invalid without an end date' do
+  it "is invalid without an end date" do
     expect(build(:conference, end_date: nil)).to have_error_on :end_date
   end
 
-  it 'is invalid when the end date is before the start date' do
-    expect(build(:conference, start_date: '2014-07-29 21:29:13', end_date: '2014-07-28 01:00:00')).to have_error_on :end_date
+  it "is invalid when the end date is before the start date" do
+    expect(build(:conference, start_date: "2014-07-29 21:29:13", end_date: "2014-07-28 01:00:00")).to have_error_on :end_date
   end
 
-  describe 'tracks association' do
+  describe "tracks association" do
     let(:conference) { build :conference }
     let(:track) { build :track }
 
@@ -61,12 +61,12 @@ RSpec.describe Conference, :type => :model do
       track.save
     end
 
-    it 'links the conference to its tracks' do
+    it "links the conference to its tracks" do
       expect(conference.tracks).to include track
     end
   end
 
-  describe 'halls association' do
+  describe "halls association" do
     let(:conference) { build :conference }
     let(:hall) { build :hall }
 
@@ -76,12 +76,12 @@ RSpec.describe Conference, :type => :model do
       hall.save
     end
 
-    it 'has many associated halls' do
+    it "has many associated halls" do
       expect(conference.halls).to include hall
     end
   end
 
-  describe 'call for participation association' do
+  describe "call for participation association" do
     let(:conference) { build :conference }
     let(:call_for_participation) { build :call_for_participation }
 
@@ -91,54 +91,54 @@ RSpec.describe Conference, :type => :model do
       call_for_participation.save
     end
 
-    it 'has one call for participation' do
+    it "has one call for participation" do
       expect(conference.call_for_participation).to eq call_for_participation
     end
 
-    it 'destroys the associated call for participation when destroyed' do
+    it "destroys the associated call for participation when destroyed" do
       conference.destroy
       expect { CallForParticipation.find(call_for_participation.id) }.to raise_exception ActiveRecord::RecordNotFound
     end
 
-    it 'creates an associated call for participation when the conference is created' do
+    it "creates an associated call for participation when the conference is created" do
       conference.save
       expect(conference.call_for_participation).to be_present
     end
   end
 
-  it 'accepts nested attributes for tracks' do
+  it "accepts nested attributes for tracks" do
     track_attributes = build(:track, conference: nil).attributes
     conference = create :conference
     expect { conference.update tracks_attributes: [track_attributes]}.to change { conference.tracks.count }.by 1
   end
 
-  it 'rejects nested attributes for tracks when they are all blank' do
+  it "rejects nested attributes for tracks when they are all blank" do
     conference = create :conference
-    expect { conference.update tracks_attributes: [{'name' => '', 'description' => ''}]}.to_not change { conference.tracks.count }
+    expect { conference.update tracks_attributes: [{"name" => "", "description" => ""}]}.to_not change { conference.tracks.count }
   end
 
-  it 'allows destruction of tracks by nested attributes' do
+  it "allows destruction of tracks by nested attributes" do
     conference = create :conference
     track_attributes = create(:track, conference: conference).attributes
-    track_attributes['_destroy'] = 1
+    track_attributes["_destroy"] = 1
     expect { conference.update tracks_attributes: [track_attributes]}.to change { conference.tracks.count }.by(-1)
   end
 
-  it 'accepts nested attributes for halls' do
+  it "accepts nested attributes for halls" do
     hall_attributes = build(:hall, conference: nil).attributes
     conference = create :conference
     expect { conference.update halls_attributes: [hall_attributes]}.to change { conference.halls.count }.by 1
   end
 
-  it 'rejects nested attributes for halls when they are all blank' do
+  it "rejects nested attributes for halls when they are all blank" do
     conference = create :conference
-    expect { conference.update halls_attributes: [{'name' => '', 'description' => ''}]}.to_not change { conference.halls.count }
+    expect { conference.update halls_attributes: [{"name" => "", "description" => ""}]}.to_not change { conference.halls.count }
   end
 
-  it 'allows destruction of halls by nested attributes' do
+  it "allows destruction of halls by nested attributes" do
     conference = create :conference
     hall_attributes = create(:hall, conference: conference).attributes
-    hall_attributes['_destroy'] = 1
+    hall_attributes["_destroy"] = 1
     expect { conference.update halls_attributes: [hall_attributes]}.to change { conference.halls.count }.by(-1)
   end
 end
diff --git a/spec/models/event_spec.rb b/spec/models/event_spec.rb
index 91fe587..4783b3b 100644
--- a/spec/models/event_spec.rb
+++ b/spec/models/event_spec.rb
@@ -1,42 +1,42 @@
-require 'rails_helper'
+require "rails_helper"
 
 describe Event, type: :model do
   let(:event) { build :event }
 
-  it 'is invalid if the event agrement is not accepted' do
+  it "is invalid if the event agrement is not accepted" do
     event.agreement = false
     expect(event).to have_error_on :agreement
   end
 
-  it 'is invalid without a title' do
-    event.title = ''
+  it "is invalid without a title" do
+    event.title = ""
     expect(event).to have_error_on :title
   end
 
-  describe 'length' do
-    it 'must be present' do
-      event.length = ''
+  describe "length" do
+    it "must be present" do
+      event.length = ""
       expect(event).to have_error_on :length
     end
 
-    it 'must be a number' do
-      event.length = 'foo'
+    it "must be a number" do
+      event.length = "foo"
       expect(event).to have_error_on :length
     end
 
-    it 'must be larger than zero' do
-      event.length = '-10'
+    it "must be larger than zero" do
+      event.length = "-10"
       expect(event).to have_error_on :length
     end
   end
 
-  it 'is invalid without an abstract' do
-    event.abstract = ''
+  it "is invalid without an abstract" do
+    event.abstract = ""
     expect(event).to have_error_on :abstract
   end
 
-  it 'is invalid without a description' do
-    event.description = ''
+  it "is invalid without a description" do
+    event.description = ""
     expect(event).to have_error_on :description
   end
 end
diff --git a/spec/models/event_type_spec.rb b/spec/models/event_type_spec.rb
index 0673653..7e77915 100644
--- a/spec/models/event_type_spec.rb
+++ b/spec/models/event_type_spec.rb
@@ -1,32 +1,31 @@
-require 'rails_helper'
+require "rails_helper"
 
 RSpec.describe EventType, type: :model do
-
-  describe 'description' do
-    it 'must be present' do
+  describe "description" do
+    it "must be present" do
       expect(build(:event_type, description: nil)).to have_error_on :description
     end
 
-    it 'is translatable' do
+    it "is translatable" do
       event_type = build(:event_type)
       expect(event_type).to have_translatable :description
     end
   end
 
-  describe 'name' do
-    it 'must be present' do
+  describe "name" do
+    it "must be present" do
       expect(build(:event_type, name: nil)).to have_error_on :name
-      expect(build(:event_type, name: '')).to have_error_on :name
+      expect(build(:event_type, name: "")).to have_error_on :name
     end
 
-    it 'must be unique for a event_type' do
+    it "must be unique for a event_type" do
       conference = create :conference
-      create :event_type, name: 'foo', conference: conference
-      expect(build(:event_type, name: 'foo', conference: conference)).to have_error_on :name
-      expect(build(:event_type, name: 'foo', conference: create(:conference))).to_not have_error_on :name
+      create :event_type, name: "foo", conference: conference
+      expect(build(:event_type, name: "foo", conference: conference)).to have_error_on :name
+      expect(build(:event_type, name: "foo", conference: create(:conference))).to_not have_error_on :name
     end
 
-    it 'is translatable' do
+    it "is translatable" do
       event_type = build(:event_type)
       expect(event_type).to have_translatable :name
     end
diff --git a/spec/models/hall_spec.rb b/spec/models/hall_spec.rb
index e1db9a8..09dd352 100644
--- a/spec/models/hall_spec.rb
+++ b/spec/models/hall_spec.rb
@@ -1,22 +1,22 @@
-require 'rails_helper'
+require "rails_helper"
 
-RSpec.describe Hall, :type => :model do
-  it 'is invalid without a name' do
-    expect(build(:hall, name: '')).to have_error_on :name
+RSpec.describe Hall, type: :model do
+  it "is invalid without a name" do
+    expect(build(:hall, name: "")).to have_error_on :name
   end
 
-  it 'belongs to a conference' do
+  it "belongs to a conference" do
     conference = create :conference
     expect(build(:hall, conference_id: conference.id).conference).to eq conference
   end
 
-  it 'has many slots' do
+  it "has many slots" do
     hall = create :hall
     slot = create :slot, hall: hall
     expect(hall.slots).to include slot
   end
 
-  it 'destroys all associated slots when destroyed' do
+  it "destroys all associated slots when destroyed" do
     hall = create :hall
     create :slot, hall: hall
     expect { hall.destroy }.to change { Slot.count }.by(-1)
diff --git a/spec/models/proposition_spec.rb b/spec/models/proposition_spec.rb
index 80e5731..2959554 100644
--- a/spec/models/proposition_spec.rb
+++ b/spec/models/proposition_spec.rb
@@ -1,15 +1,15 @@
-require 'rails_helper'
+require "rails_helper"
 
 RSpec.describe Proposition, type: :model do
-  it 'belongs to a proposer' do
+  it "belongs to a proposer" do
     user = create :user
     expect(create(:proposition, proposer: user).proposer).to eq user
   end
 
-  it 'belongs to a proposable' do
+  it "belongs to a proposable" do
     event = create :event
     expect(create(:proposition, proposable: event).proposable).to eq event
   end
 
-  it 'is invalid without an existing proposable'
+  it "is invalid without an existing proposable"
 end
diff --git a/spec/models/slot_spec.rb b/spec/models/slot_spec.rb
index 5e4b31e..b62e580 100644
--- a/spec/models/slot_spec.rb
+++ b/spec/models/slot_spec.rb
@@ -1,12 +1,12 @@
-require 'rails_helper'
+require "rails_helper"
 
-RSpec.describe Slot, :type => :model do
-  it 'belongs to a hall' do
+RSpec.describe Slot, type: :model do
+  it "belongs to a hall" do
     hall = create :hall
     expect(build(:slot, hall_id: hall.id).hall).to eq hall
   end
 
-  it 'belongs to an event' do
+  it "belongs to an event" do
     event = create :event
     expect(build(:slot, event_id: event.id).event).to eq event
   end
diff --git a/spec/models/track_spec.rb b/spec/models/track_spec.rb
index 74d8d02..9eedfa0 100644
--- a/spec/models/track_spec.rb
+++ b/spec/models/track_spec.rb
@@ -1,23 +1,23 @@
-require 'rails_helper'
+require "rails_helper"
 
-RSpec.describe Track, :type => :model do
-  it 'is invalid without a name' do
-    expect(build(:track, name: '')).to have_error_on :name
+RSpec.describe Track, type: :model do
+  it "is invalid without a name" do
+    expect(build(:track, name: "")).to have_error_on :name
   end
 
-  describe 'color' do
-    it 'must be present' do
-      expect(build(:track, color: '')).to have_error_on :color
+  describe "color" do
+    it "must be present" do
+      expect(build(:track, color: "")).to have_error_on :color
     end
 
-    it 'must be a hex RGB triplet' do
-      expect(build(:track, color: 'foobar')).to have_error_on :color
-      expect(build(:track, color: '000000')).to_not have_error_on :color
-      expect(build(:track, color: '#000000')).to_not have_error_on :color
+    it "must be a hex RGB triplet" do
+      expect(build(:track, color: "foobar")).to have_error_on :color
+      expect(build(:track, color: "000000")).to_not have_error_on :color
+      expect(build(:track, color: "#000000")).to_not have_error_on :color
     end
   end
 
-  it 'belongs to a conference' do
+  it "belongs to a conference" do
     conference = create :conference
     expect(build(:track, conference_id: conference.id).conference).to eq conference
   end
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index 155b44a..2cc7571 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -1,7 +1,7 @@
-require 'rails_helper'
+require "rails_helper"
 
 RSpec.describe User do
-  it 'lets Devise handle email and password validations' do
+  it "lets Devise handle email and password validations" do
     expect(build(:user)).to be_a Devise::Models::Validatable
   end
 end
diff --git a/spec/models/volunteership_spec.rb b/spec/models/volunteership_spec.rb
index e8bb454..6238804 100644
--- a/spec/models/volunteership_spec.rb
+++ b/spec/models/volunteership_spec.rb
@@ -1,4 +1,4 @@
-require 'rails_helper'
+require "rails_helper"
 
 RSpec.describe Volunteership, type: :model do
   pending "add some examples to (or delete) #{__FILE__}"
diff --git a/spec/rails_helper.rb b/spec/rails_helper.rb
index c258ae4..0399649 100644
--- a/spec/rails_helper.rb
+++ b/spec/rails_helper.rb
@@ -2,10 +2,10 @@
 # SimpleCov.start 'rails'
 
 # This file is copied to spec/ when you run 'rails generate rspec:install'
-ENV["RAILS_ENV"] ||= 'test'
-require 'spec_helper'
+ENV["RAILS_ENV"] ||= "test"
+require "spec_helper"
 require File.expand_path("../../config/environment", __FILE__)
-require 'rspec/rails'
+require "rspec/rails"
 
 # Requires supporting ruby files with custom matchers and macros, etc, in
 # spec/support/ and its subdirectories. Files matching `spec/**/*_spec.rb` are
@@ -28,7 +28,7 @@ RSpec.configure do |config|
   # If you're not using ActiveRecord, or you'd prefer not to run each of your
   # examples within a transaction, remove the following line or assign false
   # instead of true.
-  #config.use_transactional_fixtures = true
+  # config.use_transactional_fixtures = true
 
   # RSpec Rails can automatically mix in different behaviours to your tests
   # based on their file location, for example enabling you to call `get` and
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 85abb10..aeecf49 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -30,7 +30,7 @@ RSpec.configure do |config|
     # Use the documentation formatter for detailed output,
     # unless a formatter has already been configured
     # (e.g. via a command-line flag).
-    config.default_formatter = 'doc'
+    config.default_formatter = "doc"
   end
 
   # Print the 10 slowest examples and example groups at the
diff --git a/spec/support/capybara.rb b/spec/support/capybara.rb
index 89af46b..8aefc4a 100644
--- a/spec/support/capybara.rb
+++ b/spec/support/capybara.rb
@@ -1,7 +1,7 @@
 Capybara.default_max_wait_time = 5
-Capybara.asset_host = 'http://localhost:3000'
+Capybara.asset_host = "http://localhost:3000"
 
-Capybara.server = :puma, { Silent: true }
+Capybara.server = :puma, {Silent: true}
 Capybara.javascript_driver = :selenium_chrome_headless
 
 # RSpec.configure do |config|
diff --git a/spec/support/database_cleaner.rb b/spec/support/database_cleaner.rb
index e9c060c..da6571b 100644
--- a/spec/support/database_cleaner.rb
+++ b/spec/support/database_cleaner.rb
@@ -27,7 +27,7 @@ RSpec.configure do |config|
     # with the specs, so continue to use transaction strategy for speed.
     driver_shares_db_connection_with_specs = Capybara.current_driver == :rack_test
 
-    if !driver_shares_db_connection_with_specs
+    unless driver_shares_db_connection_with_specs
       # Driver is probably for an external browser with an app
       # under test that does *not* share a database connection with the
       # specs, so use truncation strategy.
diff --git a/spec/support/feature_helpers.rb b/spec/support/feature_helpers.rb
index 2559970..b3febab 100644
--- a/spec/support/feature_helpers.rb
+++ b/spec/support/feature_helpers.rb
@@ -1,134 +1,132 @@
 module FeatureHelpers
   def sign_in_as_admin
     visit management_root_path
-    within 'section.content' do
-      fill_in User.human_attribute_name(:email), with: 'foo@example.com'
-      fill_in User.human_attribute_name(:password), with: '123qweASD'
+    within "section.content" do
+      fill_in User.human_attribute_name(:email), with: "foo@example.com"
+      fill_in User.human_attribute_name(:password), with: "123qweASD"
       click_on I18n.t(:login)
     end
   end
 
   def create_new_conference(title = "FooConf #{1.year.from_now.year}",
-                            host_name: 'www.example.com',
-                            planned_cfp_end_date: 1.year.from_now,
-                            start_date: 1.year.from_now + 1.day,
-                            end_date: 1.year.from_now + 2.days)
-    click_on I18n.t('actions.create.button', model: Conference.model_name.human)
+    host_name: "www.example.com",
+    planned_cfp_end_date: 1.year.from_now,
+    start_date: 1.year.from_now + 1.day,
+    end_date: 1.year.from_now + 2.days)
+    click_on I18n.t("actions.create.button", model: Conference.model_name.human)
     fill_in Conference.human_attribute_name(:title), with: title
-    fill_in Conference.human_attribute_name(:email), with: 'foo@example.com'
+    fill_in Conference.human_attribute_name(:email), with: "foo@example.com"
     fill_in Conference.human_attribute_name(:host_name), with: host_name
-    select planned_cfp_end_date.year.to_s, from: 'conference[planned_cfp_end_date(1i)]'
-    select I18n.t('date.month_names')[planned_cfp_end_date.month], from: 'conference[planned_cfp_end_date(2i)]'
-    select planned_cfp_end_date.day.to_s, from: 'conference[planned_cfp_end_date(3i)]'
+    select planned_cfp_end_date.year.to_s, from: "conference[planned_cfp_end_date(1i)]"
+    select I18n.t("date.month_names")[planned_cfp_end_date.month], from: "conference[planned_cfp_end_date(2i)]"
+    select planned_cfp_end_date.day.to_s, from: "conference[planned_cfp_end_date(3i)]"
 
-    select start_date.year.to_s, from: 'conference[start_date(1i)]'
-    select I18n.t('date.month_names')[start_date.month], from: 'conference[start_date(2i)]'
-    select start_date.day.to_s, from: 'conference[start_date(3i)]'
+    select start_date.year.to_s, from: "conference[start_date(1i)]"
+    select I18n.t("date.month_names")[start_date.month], from: "conference[start_date(2i)]"
+    select start_date.day.to_s, from: "conference[start_date(3i)]"
 
-    select end_date.year.to_s, from: 'conference[end_date(1i)]'
-    select I18n.t('date.month_names')[end_date.month], from: 'conference[end_date(2i)]'
-    select end_date.day.to_s, from: 'conference[end_date(3i)]'
+    select end_date.year.to_s, from: "conference[end_date(1i)]"
+    select I18n.t("date.month_names")[end_date.month], from: "conference[end_date(2i)]"
+    select end_date.day.to_s, from: "conference[end_date(3i)]"
 
-    within '.form-group.conference_description' do
-      fill_in Conference.human_attribute_name(:description), with: 'Lorem'
+    within ".form-group.conference_description" do
+      fill_in Conference.human_attribute_name(:description), with: "Lorem"
     end
 
-    within '#event_types' do
-      fill_in EventType.human_attribute_name(:description), with: 'Lorem'
-      fill_in EventType.human_attribute_name(:minimum_length), with: '45'
-      fill_in EventType.human_attribute_name(:maximum_length), with: '45'
-
+    within "#event_types" do
+      fill_in EventType.human_attribute_name(:description), with: "Lorem"
+      fill_in EventType.human_attribute_name(:minimum_length), with: "45"
+      fill_in EventType.human_attribute_name(:maximum_length), with: "45"
     end
 
-    within '#tracks' do
-      fill_in Track.human_attribute_name(:description), with: 'Lorem'
+    within "#tracks" do
+      fill_in Track.human_attribute_name(:description), with: "Lorem"
     end
 
-    within '#volunteer_teams' do
-      fill_in VolunteerTeam.human_attribute_name(:description), with: 'Lorem'
+    within "#volunteer_teams" do
+      fill_in VolunteerTeam.human_attribute_name(:description), with: "Lorem"
     end
 
-    page.find('.btn.btn-primary').click
+    page.find(".btn.btn-primary").click
 
-    click_on I18n.t('management.conferences.show.cfp_status')
+    click_on I18n.t("management.conferences.show.cfp_status")
   end
 
   def sign_out
-    click_on I18n.t('sessions.sign_out')
+    click_on I18n.t("sessions.sign_out")
   end
 
   def register_a_new_user(visit_registration_path = true)
     if visit_registration_path
-      click_on I18n.t('sessions.sign_in')
+      click_on I18n.t("sessions.sign_in")
     end
 
-    fill_in User.human_attribute_name(:email), with: 'bar@example.com'
-    fill_in User.human_attribute_name(:password), with: '123qweASD'
-    fill_in User.human_attribute_name(:password_confirmation), with: '123qweASD'
+    fill_in User.human_attribute_name(:email), with: "bar@example.com"
+    fill_in User.human_attribute_name(:password), with: "123qweASD"
+    fill_in User.human_attribute_name(:password_confirmation), with: "123qweASD"
 
-    within '.form-actions' do
-      page.find('.btn').click
+    within ".form-actions" do
+      page.find(".btn").click
     end
     visit(user_confirmation_path + "?confirmation_token=" + User.order(created_at: :desc).first.confirmation_token)
   end
 
   def sign_in_as_an_existing_user(visit_sign_in_path = true)
     if visit_sign_in_path
-      click_on I18n.t('sessions.sign_in')
+      click_on I18n.t("sessions.sign_in")
     end
 
-    within 'section.content' do
-      fill_in User.human_attribute_name(:email), with: 'bar@example.com'
-      fill_in User.human_attribute_name(:password), with: '123qweASD'
+    within "section.content" do
+      fill_in User.human_attribute_name(:email), with: "bar@example.com"
+      fill_in User.human_attribute_name(:password), with: "123qweASD"
       click_on I18n.t(:login)
     end
   end
 
-
   def submit_an_event_proposition(visit_event_submission_path = true)
     if visit_event_submission_path
       visit root_path
-      click_on I18n.t('views.welcome.submit_event', event_type: Conference.first.event_types.first.name.downcase)
+      click_on I18n.t("views.welcome.submit_event", event_type: Conference.first.event_types.first.name.downcase)
     end
 
-    fill_in Event.human_attribute_name(:title), with: 'This is just a sample title of an event'
+    fill_in Event.human_attribute_name(:title), with: "This is just a sample title of an event"
     select Conference.first.tracks.first.name, from: Event.human_attribute_name(:track)
-    fill_in Event.human_attribute_name(:length), with: '45'
-    fill_in Event.human_attribute_name(:abstract), with: 'Lorem'
-    fill_in Event.human_attribute_name(:description), with: 'Ipsum'
+    fill_in Event.human_attribute_name(:length), with: "45"
+    fill_in Event.human_attribute_name(:abstract), with: "Lorem"
+    fill_in Event.human_attribute_name(:description), with: "Ipsum"
     check Event.human_attribute_name(:agreement)
 
-    click_on I18n.t('helpers.submit.event.create')
+    click_on I18n.t("helpers.submit.event.create")
   end
 
   def fill_in_personal_profile
-    attach_file PersonalProfile.human_attribute_name(:picture), Rails.root.join('spec', 'support', 'picture.jpg')
-    fill_in PersonalProfile.human_attribute_name(:first_name), with: 'Foo'
-    fill_in PersonalProfile.human_attribute_name(:last_name), with: 'Bar'
-    fill_in PersonalProfile.human_attribute_name(:mobile_phone), with: '+359666666'
-    fill_in PersonalProfile.human_attribute_name(:biography), with: 'Lorem'
+    attach_file PersonalProfile.human_attribute_name(:picture), Rails.root.join("spec", "support", "picture.jpg")
+    fill_in PersonalProfile.human_attribute_name(:first_name), with: "Foo"
+    fill_in PersonalProfile.human_attribute_name(:last_name), with: "Bar"
+    fill_in PersonalProfile.human_attribute_name(:mobile_phone), with: "+359666666"
+    fill_in PersonalProfile.human_attribute_name(:biography), with: "Lorem"
 
-    click_on I18n.t('helpers.submit.create', model: PersonalProfile.model_name.human)
+    click_on I18n.t("helpers.submit.create", model: PersonalProfile.model_name.human)
   end
 
   def fill_in_volunteer_profile
-    attach_file Volunteer.human_attribute_name(:picture), Rails.root.join('spec', 'support', 'picture.jpg')
-    fill_in Volunteer.human_attribute_name(:name), with: 'Volunteer Foo'
-    fill_in Volunteer.human_attribute_name(:email), with: 'foo@example.com'
-    fill_in Volunteer.human_attribute_name(:phone), with: '+359666666'
+    attach_file Volunteer.human_attribute_name(:picture), Rails.root.join("spec", "support", "picture.jpg")
+    fill_in Volunteer.human_attribute_name(:name), with: "Volunteer Foo"
+    fill_in Volunteer.human_attribute_name(:email), with: "foo@example.com"
+    fill_in Volunteer.human_attribute_name(:phone), with: "+359666666"
     check VolunteerTeam.first.name
 
-    click_on I18n.t('helpers.submit.volunteer.create')
+    click_on I18n.t("helpers.submit.volunteer.create")
   end
 
   def verify_the_event_is_submitted
     sign_in_as_admin
     click_on_first_conference_in_management_root
     click_on Event.model_name.human(count: 2).capitalize
-    expect(page).to have_content 'This is just a sample title of an event'
+    expect(page).to have_content "This is just a sample title of an event"
   end
 
   def click_on_first_conference_in_management_root
-    click_on I18n.t('actions.view.button', model: Conference.model_name.human), match: :first
+    click_on I18n.t("actions.view.button", model: Conference.model_name.human), match: :first
   end
 end
diff --git a/spec/support/matchers/has_translatable.rb b/spec/support/matchers/has_translatable.rb
index cef584d..09721fb 100644
--- a/spec/support/matchers/has_translatable.rb
+++ b/spec/support/matchers/has_translatable.rb
@@ -1,14 +1,14 @@
 RSpec::Matchers.define :have_translatable do |expected|
   match do |actual|
     I18n.locale = :bg
-    actual.send "#{expected.to_s}=", 'Test Bulgarian'
+    actual.send "#{expected}=", "Test Bulgarian"
 
     I18n.locale = :en
-    actual.send "#{expected.to_s}=", 'Test English'
+    actual.send "#{expected}=", "Test English"
 
-    expect(actual.send expected).to eq 'Test English'
+    expect(actual.send(expected)).to eq "Test English"
 
     I18n.locale = :bg
-    expect(actual.send expected).to eq 'Test Bulgarian'
+    expect(actual.send(expected)).to eq "Test Bulgarian"
   end
 end