Add frozen_string_literal magic comment

re: https://www.rubydoc.info/gems/rubocop/RuboCop/Cop/Style/FrozenStringLiteralComment

spec/controllers/admin/booths_controller_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Admin::BoothsController do

spec/controllers/admin/comments_controller_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Admin::CommentsController, type: :controller do

spec/controllers/admin/conferences_controller_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Admin::ConferencesController do

spec/controllers/admin/event_schedules_controller_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Admin::EventSchedulesController do

spec/controllers/admin/events_controller_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Admin::EventsController do

spec/controllers/admin/organizations_controller_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Admin::OrganizationsController do

spec/controllers/admin/programs_controller_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Admin::ProgramsController, type: :controller do

spec/controllers/admin/registration_periods_controller_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Admin::RegistrationPeriodsController do

spec/controllers/admin/roles_controller_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Admin::RolesController do

spec/controllers/admin/rooms_controller_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Admin::RoomsController do

spec/controllers/admin/schedules_controller_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Admin::SchedulesController do

spec/controllers/admin/sponsorship_levels_controller_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Admin::SponsorshipLevelsController do

spec/controllers/admin/targets_controller_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Admin::TargetsController, type: :controller do

spec/controllers/admin/ticket_scannings_controller_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Admin::TicketScanningsController do

spec/controllers/admin/tracks_controller_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Admin::TracksController do

spec/controllers/admin/users_controller_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 describe Admin::UsersController do
   let(:admin) { create(:admin) }

spec/controllers/admin/versions_controller_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Admin::VersionsController do