Use frozen string literal in actioncable/

Author: kirs

.rubocop.yml

@@ -89,6 +89,7 @@ Style/FrozenStringLiteralComment:
   Include:
     - 'activesupport/**/*'
     - 'activemodel/**/*'
+    - 'actioncable/**/*'
     - 'activejob/**/*'
     - 'activerecord/**/*'
     - 'actionmailer/**/*'

actioncable/Rakefile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "rake/testtask"
 require "pathname"
 require "open3"

actioncable/actioncable.gemspec

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 version = File.read(File.expand_path("../RAILS_VERSION", __dir__)).strip
 
 Gem::Specification.new do |s|

actioncable/bin/test

@@ -1,4 +1,5 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
 COMPONENT_ROOT = File.expand_path("..", __dir__)
 require_relative "../../tools/test"

actioncable/lib/action_cable.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #--
 # Copyright (c) 2015-2017 Basecamp, LLC
 #

actioncable/lib/action_cable/channel.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ActionCable
   module Channel
     extend ActiveSupport::Autoload

actioncable/lib/action_cable/channel/base.rb

@@ -270,7 +270,7 @@ def dispatch_action(action, data)
         end
 
         def action_signature(action, data)
-          "#{self.class.name}##{action}".tap do |signature|
+          "#{self.class.name}##{action}".dup.tap do |signature|
             if (arguments = data.except("action")).any?
               signature << "(#{arguments.inspect})"
             end

actioncable/lib/action_cable/channel/broadcasting.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "active_support/core_ext/object/to_param"
 
 module ActionCable

actioncable/lib/action_cable/channel/callbacks.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "active_support/callbacks"
 
 module ActionCable

actioncable/lib/action_cable/channel/naming.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ActionCable
   module Channel
     module Naming