Make the action helper examples syntax hilight correctly.

Don't ask me why this works...

####  http://emberjs.com/api/classes/Ember.Handlebars.helpers.html#method_action
#### Before
![screen shot 2014-11-05 at 5 14 10 pm](https://cloud.githubusercontent.com/assets/54056/4927159/1fae5b52-6539-11e4-9937-e5a984fb65ae.png)


#### After
![screen shot 2014-11-05 at 5 07 07 pm](https://cloud.githubusercontent.com/assets/54056/4927161/22445ec0-6539-11e4-8467-a009845b5133.png)