Use modern string-of-arrays syntax

Author: David Heinemeier Hansson

lib/generators/rails/templates/api_controller.rb

@@ -4,7 +4,7 @@
 <% end -%>
 <% module_namespacing do -%>
 class <%= controller_class_name %>Controller < ApplicationController
-  before_action :set_<%= singular_table_name %>, only: [:show, :update, :destroy]
+  before_action :set_<%= singular_table_name %>, only: %w[ show update destroy ]
 
   # GET <%= route_url %>
   # GET <%= route_url %>.json

lib/generators/rails/templates/controller.rb

@@ -4,7 +4,7 @@
 <% end -%>
 <% module_namespacing do -%>
 class <%= controller_class_name %>Controller < ApplicationController
-  before_action :set_<%= singular_table_name %>, only: [:show, :edit, :update, :destroy]
+  before_action :set_<%= singular_table_name %>, only: %w[ show edit update destroy ]
 
   # GET <%= route_url %>
   # GET <%= route_url %>.json