Update template files to follow the standard gem code formatter recommendations

.gitignore

@@ -18,3 +18,4 @@ pkg/
 /tmp/
 /yarn-error.log
 /test-reports/
+.DS_Store

railties/lib/rails/generators/rails/app/templates/app/mailers/application_mailer.rb.tt

@@ -1,4 +1,4 @@
 class ApplicationMailer < ActionMailer::Base
-  default from: 'from@example.com'
+  default from: "from@example.com"
-  layout 'mailer'
+  layout "mailer"
 end

railties/lib/rails/generators/rails/app/templates/config/boot.rb.tt

@@ -1,4 +1,4 @@
-ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)
+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
 
 require "bundler/setup" # Set up gems listed in the Gemfile.
 <% if depend_on_bootsnap? -%>

railties/lib/rails/generators/rails/app/templates/config/environments/development.rb.tt

@@ -16,7 +16,7 @@ Rails.application.configure do
 
   # Enable/disable caching. By default caching is disabled.
   # Run rails dev:cache to toggle caching.
-  if Rails.root.join('tmp/caching-dev.txt').exist?
+  if Rails.root.join("tmp/caching-dev.txt").exist?
     <%- unless options.api? -%>
     config.action_controller.perform_caching = true
     config.action_controller.enable_fragment_cache_logging = true
@@ -24,7 +24,7 @@ Rails.application.configure do
     <%- end -%>
     config.cache_store = :memory_store
     config.public_file_server.headers = {
-      'Cache-Control' => "public, max-age=#{2.days.to_i}"
+      "Cache-Control" => "public, max-age=#{2.days.to_i}"
     }
   else
     config.action_controller.perform_caching = false
@@ -79,7 +79,7 @@ Rails.application.configure do
 
   # Use an evented file watcher to asynchronously detect changes in source code,
   # routes, locales, etc. This feature depends on the listen gem.
-  <%= '# ' unless depend_on_listen? %>config.file_watcher = ActiveSupport::EventedFileUpdateChecker
+  <%= "# " unless depend_on_listen? %>config.file_watcher = ActiveSupport::EventedFileUpdateChecker
 
   # Uncomment if you wish to allow Action Cable access from any origin.
   # config.action_cable.disable_request_forgery_protection = true

railties/lib/rails/generators/rails/app/templates/config/environments/production.rb.tt

@@ -24,7 +24,7 @@ Rails.application.configure do
 
   # Disable serving static files from the `/public` folder by default since
   # Apache or NGINX already handles this.
-  config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?
+  config.public_file_server.enabled = ENV["RAILS_SERVE_STATIC_FILES"].present?
 
   <%- unless options.skip_sprockets? -%>
   # Compress CSS using a preprocessor.
@@ -35,11 +35,11 @@ Rails.application.configure do
 
   <%- end -%>
   # Enable serving of images, stylesheets, and JavaScripts from an asset server.
-  # config.asset_host = 'http://assets.example.com'
+  # config.asset_host = "http://assets.example.com"
 
   # Specifies the header that your server uses for sending files.
-  # config.action_dispatch.x_sendfile_header = 'X-Sendfile' # for Apache
+  # config.action_dispatch.x_sendfile_header = "X-Sendfile" # for Apache
-  # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for NGINX
+  # config.action_dispatch.x_sendfile_header = "X-Accel-Redirect" # for NGINX
 
   <%- unless skip_active_storage? -%>
   # Store uploaded files on the local file system (see config/storage.yml for options).
@@ -49,8 +49,8 @@ Rails.application.configure do
   <%- unless options[:skip_action_cable] -%>
   # Mount Action Cable outside main process or domain.
   # config.action_cable.mount_path = nil
-  # config.action_cable.url = 'wss://example.com/cable'
+  # config.action_cable.url = "wss://example.com/cable"
-  # config.action_cable.allowed_request_origins = [ 'http://example.com', /http:\/\/example.*/ ]
+  # config.action_cable.allowed_request_origins = [ "http://example.com", /http:\/\/example.*/ ]
 
   <%- end -%>
   # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
@@ -98,7 +98,7 @@ Rails.application.configure do
 
   # Use a different logger for distributed setups.
   # require "syslog/logger"
-  # config.logger = ActiveSupport::TaggedLogging.new(Syslog::Logger.new 'app-name')
+  # config.logger = ActiveSupport::TaggedLogging.new(Syslog::Logger.new "app-name")
 
   if ENV["RAILS_LOG_TO_STDOUT"].present?
     logger           = ActiveSupport::Logger.new(STDOUT)

railties/lib/rails/generators/rails/app/templates/config/environments/test.rb.tt

@@ -24,7 +24,7 @@ Rails.application.configure do
   # Configure public file server for tests with Cache-Control for performance.
   config.public_file_server.enabled = true
   config.public_file_server.headers = {
-    'Cache-Control' => "public, max-age=#{1.hour.to_i}"
+    "Cache-Control" => "public, max-age=#{1.hour.to_i}"
   }
 
   # Show full error reports and disable caching.

railties/lib/rails/generators/rails/app/templates/config/initializers/assets.rb.tt

@@ -1,13 +1,13 @@
 # Be sure to restart your server when you modify this file.
 
 # Version of your assets, change this if you want to expire all your assets.
-Rails.application.config.assets.version = '1.0'
+Rails.application.config.assets.version = "1.0"
 
 # Add additional assets to the asset load path.
 # Rails.application.config.assets.paths << Emoji.images_path
 <%- unless options[:skip_javascript] -%>
 # Add Yarn node_modules folder to the asset load path.
-Rails.application.config.assets.paths << Rails.root.join('node_modules')
+Rails.application.config.assets.paths << Rails.root.join("node_modules")
 <%- end -%>
 
 # Precompile additional assets.

railties/lib/rails/generators/rails/app/templates/test/test_helper.rb.tt

@@ -1,4 +1,4 @@
-ENV['RAILS_ENV'] ||= 'test'
+ENV["RAILS_ENV"] ||= "test"
 require_relative "../config/environment"
 require "rails/test_help"