Enable Layout/TrailingWhitespace cop and auto-correct offenses

.rubocop.yml

@@ -251,6 +251,10 @@ Layout/Tab:
 Layout/TrailingBlankLines:
   Enabled: true
+# Avoid trailing whitespace.
+Layout/TrailingWhitespace:
+  Enabled: true
+
 # Style #######################################################################
 # Check the naming of accessor methods for get_/set_.

.rubocop_todo.yml

@@ -57,11 +57,6 @@ Layout/SpaceInsideParens:
 Layout/SpaceInsidePercentLiteralDelimiters:
   Enabled: false
-# Offense count: 89
-# Cop supports --auto-correct.
-Layout/TrailingWhitespace:
-  Enabled: false
-
 # Offense count: 272
 RSpec/EmptyLineAfterFinalLet:
   Enabled: false

app/controllers/groups/application_controller.rb

@@ -34,7 +34,7 @@ class Groups::ApplicationController < ApplicationController
   def build_canonical_path(group)
     params[:group_id] = group.to_param
-    
+
     url_for(params)
   end
 end

app/controllers/omniauth_callbacks_controller.rb

@@ -142,13 +142,13 @@ class OmniauthCallbacksController < Devise::OmniauthCallbacksController
   def oauth
     @oauth ||= request.env['omniauth.auth']
   end
-  
+
   def fail_login
     error_message = @user.errors.full_messages.to_sentence
     return redirect_to omniauth_error_path(oauth['provider'], error: error_message)
   end
-  
+
   def fail_ldap_login
     flash[:alert] = 'Access denied for your LDAP account.'

app/controllers/projects/cycle_analytics/events_controller.rb

@@ -2,7 +2,7 @@ module Projects
   module CycleAnalytics
     class EventsController < Projects::ApplicationController
       include CycleAnalyticsParams
-    
+
       before_action :authorize_read_cycle_analytics!
       before_action :authorize_read_build!, only: [:test, :staging]
       before_action :authorize_read_issue!, only: [:issue, :production]
@@ -11,33 +11,33 @@ module Projects
       def issue
         render_events(cycle_analytics[:issue].events)
       end
-    
+
       def plan
         render_events(cycle_analytics[:plan].events)
       end
-    
+
       def code
         render_events(cycle_analytics[:code].events)
       end
-    
+
       def test
         options(events_params)[:branch] = events_params[:branch_name]
-    
+
         render_events(cycle_analytics[:test].events)
       end
-    
+
       def review
         render_events(cycle_analytics[:review].events)
       end
-    
+
       def staging
         render_events(cycle_analytics[:staging].events)
       end
-    
+
       def production
         render_events(cycle_analytics[:production].events)
       end
-    
+
       private
       def render_events(events)
@@ -46,14 +46,14 @@ module Projects
           format.json { render json: { events: events } }
         end
       end
-    
+
       def cycle_analytics
         @cycle_analytics ||= ::CycleAnalytics.new(project, options(events_params))
       end
-    
+
       def events_params
         return {} unless params[:events].present?
-    
+
         params[:events].permit(:start_date, :branch_name)
       end
     end

app/controllers/projects/merge_requests_controller.rb

@@ -218,8 +218,8 @@ class Projects::MergeRequestsController < Projects::MergeRequests::ApplicationCo
             if can?(current_user, :read_environment, environment) && environment.has_metrics?
               metrics_project_environment_deployment_path(environment.project, environment, deployment)
             end
-          
-          metrics_monitoring_url = 
+
+          metrics_monitoring_url =
             if can?(current_user, :read_environment, environment)
               environment_metrics_path(environment)
             end

app/helpers/pipeline_schedules_helper.rb

 module PipelineSchedulesHelper
   def timezone_data
-    ActiveSupport::TimeZone.all.map do |timezone| 
-      { 
-        name: timezone.name, 
-        offset: timezone.utc_offset, 
-        identifier: timezone.tzinfo.identifier 
+    ActiveSupport::TimeZone.all.map do |timezone|
+      {
+        name: timezone.name,
+        offset: timezone.utc_offset,
+        identifier: timezone.tzinfo.identifier
       }
     end
   end

app/models/blob_viewer/notebook.rb

@@ -2,7 +2,7 @@ module BlobViewer
   class Notebook < Base
     include Rich
     include ClientSide
-    
+
     self.partial_name = 'notebook'
     self.extensions = %w(ipynb)
     self.binary = false

app/models/deploy_keys_project.rb

@@ -12,7 +12,7 @@ class DeployKeysProject < ActiveRecord::Base
   def destroy_orphaned_deploy_key
     return unless self.deploy_key.destroyed_when_orphaned? && self.deploy_key.orphaned?
-    
+
     self.deploy_key.destroy
   end
 end

app/models/redirect_route.rb

@@ -14,7 +14,7 @@ class RedirectRoute < ActiveRecord::Base
              else
                'redirect_routes.path = ? OR redirect_routes.path LIKE ?'
              end
-             
+
     where(wheres, path, "#{sanitize_sql_like(path)}/%")
   end
 end

app/serializers/project_entity.rb

 class ProjectEntity < Grape::Entity
   include RequestAwareEntity
-  
+
   expose :id
   expose :name

app/serializers/tree_root_entity.rb

 # TODO: Inherit from TreeEntity, when `Tree` implements `id` and `name` like `Gitlab::Git::Tree`.
 class TreeRootEntity < Grape::Entity
   expose :path
-  
+
   expose :trees, using: TreeEntity
   expose :blobs, using: BlobEntity
   expose :submodules, using: SubmoduleEntity

config/initializers/0_acts_as_taggable.rb

@@ -5,5 +5,5 @@ ActsAsTaggableOn.strict_case_match = true
 ActsAsTaggableOn.tags_counter = false
 # validate that counter cache is disabled
-raise "Counter cache is not disabled" if 
+raise "Counter cache is not disabled" if
     ActsAsTaggableOn::Tagging.reflections["tag"].options[:counter_cache]

config/initializers/static_files.rb

 app = Rails.application
 if app.config.serve_static_files
-  # The `ActionDispatch::Static` middleware intercepts requests for static files 
-  # by checking if they exist in the `/public` directory. 
+  # The `ActionDispatch::Static` middleware intercepts requests for static files
+  # by checking if they exist in the `/public` directory.
   # We're replacing it with our `Gitlab::Middleware::Static` that does the same,
   # except ignoring `/uploads`, letting those go through to the GitLab Rails app.
   app.config.middleware.swap(
-    ActionDispatch::Static, 
-    Gitlab::Middleware::Static, 
-    app.paths["public"].first, 
+    ActionDispatch::Static,
+    Gitlab::Middleware::Static,
+    app.paths["public"].first,
     app.config.static_cache_control
   )

config/initializers/trusted_proxies.rb

@@ -2,7 +2,7 @@
 # as the ActionDispatch::Request object. This is necessary for libraries
 # like rack_attack where they don't use ActionDispatch, and we want them
 # to block/throttle requests on private networks.
-# Rack Attack specific issue: https://github.com/kickstarter/rack-attack/issues/145 
+# Rack Attack specific issue: https://github.com/kickstarter/rack-attack/issues/145
 module Rack
   class Request
     def trusted_proxy?(ip)

config/routes/repository.rb

@@ -3,7 +3,7 @@
 resource :repository, only: [:create] do
   member do
     get ':ref/archive', constraints: { format: Gitlab::PathRegex.archive_formats_regex, ref: /.+/ }, action: 'archive', as: 'archive'
-    
+
     # deprecated since GitLab 9.5
     get 'archive', constraints: { format: Gitlab::PathRegex.archive_formats_regex }, as: 'archive_alternative'
   end

db/migrate/20161020075830_default_request_access_projects.rb

 class DefaultRequestAccessProjects < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers
   DOWNTIME = false
-  
+
   def up
     change_column_default :projects, :request_access_enabled, false
   end

db/post_migrate/20170503004427_update_retried_for_ci_build.rb

@@ -21,7 +21,7 @@ class UpdateRetriedForCiBuild < ActiveRecord::Migration
   private
   def up_mysql
-    # This is a trick to overcome MySQL limitation: 
+    # This is a trick to overcome MySQL limitation:
     # Mysql2::Error: Table 'ci_builds' is specified twice, both as a target for 'UPDATE' and as a separate source for data
     # However, this leads to create a temporary table from `max(ci_builds.id)` which is slow and do full database update
     execute <<-SQL.strip_heredoc

db/post_migrate/20170523083112_migrate_old_artifacts.rb

@@ -7,7 +7,7 @@ class MigrateOldArtifacts < ActiveRecord::Migration
   # This uses special heuristic to find potential candidates for data migration
   # Read more about this here: https://gitlab.com/gitlab-org/gitlab-ce/issues/32036#note_30422345
-  
+
   def up
     builds_with_artifacts.find_each do |build|
       build.migrate_artifacts!
@@ -51,14 +51,14 @@ class MigrateOldArtifacts < ActiveRecord::Migration
     private
     def source_artifacts_path
-      @source_artifacts_path ||= 
+      @source_artifacts_path ||=
         File.join(Gitlab.config.artifacts.path,
           created_at.utc.strftime('%Y_%m'),
           ci_id.to_s, id.to_s)
     end
     def target_artifacts_path
-      @target_artifacts_path ||= 
+      @target_artifacts_path ||=
         File.join(Gitlab.config.artifacts.path,
           created_at.utc.strftime('%Y_%m'),
           project_id.to_s, id.to_s)

features/steps/profile/emails.rb

@@ -28,7 +28,7 @@ class Spinach::Features::ProfileEmails < Spinach::FeatureSteps
     expect(email).to be_nil
     expect(page).not_to have_content("my@email.com")
   end
-  
+
   step 'I click link "Remove" for "my@email.com"' do
     # there should only be one remove button at this time
     click_link "Remove"