Fix Style/FrozenStringLiteralComment.

#1157 added the frozen string literal comment to _most_ files; this
cop fixes the remaining files and enforces the presence of the frozen
string literal comment in future files.

.rubocop.yml

@@ -36,22 +36,6 @@ Style/BlockDelimiters:
     - refute_silent
     - refute_throws
 
-# Offense count: 130
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle.
-# SupportedStyles: when_needed, always, never
-#
-# Description from Rubocop Manual:
-#   This cop is designed to help upgrade to Ruby 3.0. It will add the comment
-#   `# frozen_string_literal: true` to the top of files to enable frozen string
-#   literals. Frozen string literals may be default in Ruby 3.0. The comment
-#   will be added below a shebang and encoding comment. The frozen string
-#   literal comment is only valid in Ruby 2.3+.
-#
-# https://rubocop.readthedocs.io/en/latest/cops_style/#stylefrozenstringliteralcomment
-Style/FrozenStringLiteralComment:
-  Enabled: false
-
 # Offense count: 34
 # Cop supports --auto-correct.
 # Configuration parameters: AutoCorrect, EnforcedStyle.

Appraisals

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 [
   { name: '4-2', version: '4.2.10' }
 ].each do |rails|

Gemfile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source 'https://rubygems.org'
 
 # Declare your gem's dependencies in devise_token_auth.gemspec.

Guardfile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # A sample Guardfile
 # More info at https://github.com/guard/guard#readme
 

bin/rails

@@ -1,4 +1,6 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 # This command will automatically be run when you run "rails" with Rails 4 gems installed from the root of your application.
 
 ENGINE_ROOT = File.expand_path('..', __dir__)

devise_token_auth.gemspec

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 $:.push File.expand_path('lib', __dir__)
 
 # Maintain your gem's version:

gemfiles/rails_4_2.gemfile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This file was generated by Appraisal
 
 source 'https://rubygems.org'

gemfiles/rails_5_0.gemfile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This file was generated by Appraisal
 
 source 'https://rubygems.org'

gemfiles/rails_5_1.gemfile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This file was generated by Appraisal
 
 source 'https://rubygems.org'

test/dummy/bin/bundle

@@ -1,3 +1,5 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)
 load Gem.bin_path('bundler', 'bundle')

test/dummy/bin/rails

@@ -1,4 +1,6 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 begin
   load File.expand_path('spring', __dir__)
 rescue LoadError

test/dummy/bin/rake

@@ -1,4 +1,6 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 begin
   load File.expand_path('spring', __dir__)
 rescue LoadError

test/dummy/bin/spring

@@ -1,4 +1,5 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
 # This file loads spring without using Bundler, in order to be fast
 # It gets overwritten when you run the `spring binstub` command

test/dummy/config.ru

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This file is used by Rack-based servers to start the application.
 
 require ::File.expand_path('../config/environment',  __FILE__)

test/dummy/db/schema.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This file is auto-generated from the current state of the database. Instead
 # of editing this file, please use the migrations feature of Active Record to
 # incrementally modify your database, and then regenerate this schema definition.