Add frozen_string_literal

ee/app/services/ee/issues/update_service.rb

+# frozen_string_literal: true
+
 module EE
   module Issues
     module UpdateService

ee/app/services/ee/milestones/update_service.rb

+# frozen_string_literal: true
+
 module EE
   module Milestones
     module UpdateService

ee/db/migrate/20180711014025_add_date_columns_to_epics.rb

+# frozen_string_literal: true
+
 class AddDateColumnsToEpics < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers
 

ee/db/migrate/20180711014026_update_date_columns_on_epics.rb

+# frozen_string_literal: true
+
 class UpdateDateColumnsOnEpics < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers
 

ee/db/post_migrate/20180713171825_update_epic_dates_from_milestones.rb

+# frozen_string_literal: true
+
 class UpdateEpicDatesFromMilestones < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers
 

ee/spec/services/ee/issues/update_service_spec.rb

+# frozen_string_literal: true
 require 'spec_helper'
 
 describe Issues::UpdateService do

ee/spec/services/milestones/update_service_spec.rb

+# frozen_string_literal: true
 require 'spec_helper'
 
 describe Milestones::UpdateService do

spec/services/milestones/update_service_spec.rb

+# frozen_string_literal: true
 require 'spec_helper'
 
 describe Milestones::UpdateService do