README.md in codemirror-rails-4.8 vs README.md in codemirror-rails-4.9

@@ -19,32 +19,48 @@
 
 ## CodeMirror for Rails >= 3.1
 
 All of the assets from the most latest stable CodeMirror release are vendored
 so that you can use them with the asset pipeline.  At a minimum, you will
-probably want the following in your application.js and application.css:
+probably want the following in your application.js:
 
 ```js
 //= require codemirror
 ```
 
+And in your application.css:
+
+```css
+/*
+*= require codemirror
+*/
+```
+
 ### Adding a mode
 
 Additional syntax modes can be added to your application.js:
 
 ```js
 //= require codemirror/modes/ruby
 ```
 
-### Adding a util
+### Adding an addon
 
-Additional reusable util components can be added in your application.js:
+Additional addons can be added in your application.js:
 
 ```js
-//= require codemirror/utils/dialog
+//= require_tree codemirror/addons/dialog
 ```
 
+And your application.css:
+
+```css
+/*
+*= require_tree codemirror/addons/dialog
+*/
+```
+
 ### Adding a keymap
 
 Additional keymap bindings can be added to your application.js:
 
 ```js
@@ -53,11 +69,13 @@
 
 ### Adding a theme
 
 Additional CSS themes can be added to your application.css
 
-```js
-//= require codemirror/themes/night
+```css
+/*
+*= require codemirror/themes/night
+*/
 ```
 
 ### Precompiling Codemirror
 
 If your project is using precompiling, depending on your method of grabbing files to precompile, you might need to add the below line to your ```` application.rb```, to get rails to precompile all js, css files used by codemirror. You can also manually whitelist only the files that you use.