apply StringLiterals cop (remove double quotes, unless there is string interpolation)

config/application.rb

@@ -36,7 +36,7 @@ module Osem
     # config.i18n.default_locale = :de
 
     # Configure the default encoding used in templates for Ruby 1.9.
-    config.encoding = "utf-8"
+    config.encoding = 'utf-8'
 
     # Configure sensitive parameters which will be filtered from the log file.
     config.filter_parameters += [:password]

config/environment.rb

@@ -2,7 +2,7 @@
 require File.expand_path('../application', __FILE__)
 
 # Load the configuration file
-path = Rails.root.join("config", "config.yml")
+path = Rails.root.join('config', 'config.yml')
 begin
   CONFIG = YAML.load_file(path)[Rails.env]
 rescue

config/environments/test.rb

@@ -9,7 +9,7 @@ Osem::Application.configure do
 
   # Configure static asset server for tests with Cache-Control for performance
   config.serve_static_assets = true
-  config.static_cache_control = "public, max-age=3600"
+  config.static_cache_control = 'public, max-age=3600'
 
   # Do not eager load code on boot.
   config.eager_load = false

config/initializers/formtastic.rb

@@ -22,7 +22,7 @@ Formtastic::FormBuilder.include_blank_for_select_by_default = false
 # '<abbr title="required">*</abbr>'. In other words, if you configure formtastic.required
 # in your locale, it will replace the abbr title properly. But if you don't want to use
 # abbr tag, you can simply give a string as below
-Formtastic::FormBuilder.required_string = "(required)"
+Formtastic::FormBuilder.required_string = '(required)'
 
 # Set the string that will be appended to the labels/fieldsets which are optional
 # Defaults to an empty string ("") and also accepts procs (see required_string above)

config/initializers/time_formats.rb

@@ -1 +1 @@
-Time::DATE_FORMATS[:db_without_seconds] = "%Y-%m-%d %H:%M"
+Time::DATE_FORMATS[:db_without_seconds] = '%Y-%m-%d %H:%M'

config/routes.rb

@@ -69,7 +69,7 @@ Osem::Application.routes.draw do
         end
       end
 
-      patch "/questions/update_conference" => "questions#update_conference"
+      patch '/questions/update_conference' => 'questions#update_conference'
       resources :questions
 
       resources :events do
@@ -91,7 +91,7 @@ Osem::Application.routes.draw do
   resources :conference, only: [:show] do
     resources :proposal do
       resources :commercials, except: [:show, :index]
-      resources :event_attachment, controller: "event_attachments"
+      resources :event_attachment, controller: 'event_attachments'
       member do
         patch '/confirm' => 'proposal#confirm'
         patch '/restart' => 'proposal#restart'
@@ -103,13 +103,13 @@ Osem::Application.routes.draw do
     resources :ticket_purchases, only: [:create, :destroy]
 
     resource :schedule, only: [] do
-      get "/" => "schedule#index"
+      get '/' => 'schedule#index'
     end
 
     member do
-      get "gallery_photos"
-      patch "subscription" => "conference#subscribe"
-      delete "subscription" => "conference#unsubscribe"
+      get 'gallery_photos'
+      patch 'subscription' => 'conference#subscribe'
+      delete 'subscription' => 'conference#unsubscribe'
     end
   end
 
@@ -129,7 +129,7 @@ Osem::Application.routes.draw do
     end
   end
 
-  get "/admin" => redirect("/admin/conference")
+  get '/admin' => redirect('/admin/conference')
 
   root to: 'home#index', via: [:get, :options]
 end