minor doc fixes

Before:
![ember js - ember logger 2014-02-16 02-20-05 2014-02-16 02-20-09](https://f.cloud.github.com/assets/1131196/2179819/c5500f0c-96da-11e3-9e76-6bafd518415d.jpg)

After:
![ember js - ember logger 2014-02-16 02-20-30 2014-02-16 02-20-34](https://f.cloud.github.com/assets/1131196/2179820/d4149184-96da-11e3-867f-8351bc712211.jpg)