Remove Rubocop offense in config/initializers/assets.rb

Author: Uaitt

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

@@ -10,5 +10,5 @@ Rails.application.config.assets.version = "1.0"
 # Precompile additional assets.
 # application.js, application.css, and all non-JS/CSS in the app/assets
 # folder are already added.
-# Rails.application.config.assets.precompile += %w( admin.js admin.css )
+# Rails.application.config.assets.precompile += %w[ admin.js admin.css ]
 <% end -%>