Fix gist styles

# Before

![image](https://cloud.githubusercontent.com/assets/992008/5520728/f1b65708-89ce-11e4-81ee-17dc2fc2472c.png)

# After

![image](https://cloud.githubusercontent.com/assets/992008/5520731/01b24d92-89cf-11e4-8c58-6ea88d73ba1d.png)