README.md in codemirror-rails-2.2.1 vs README.md in codemirror-rails-2.3

@@ -33,9 +33,17 @@
 
 ```js
 //= require codemirror/modes/ruby
 ```
 
+### Adding a util
+
+Additional reusable util components can be added in your application.js:
+
+```js
+//= require codemirror/utils/dialog
+```
+
 ### Adding a keymap
 
 Additional keymap bindings can be added to your application.js:
 
 ```js