fixed the multi-line issue for criterion prompt, criterion option text,

Fixed the multi-line issue for criterion prompt, criterion option text, peer assessment feedback and self assessment feedback. tnl-814
To add the white-space for criterion option text.
See the image below:
![screen shot 2014-11-19 at 5 27 00 pm 2](https://cloud.githubusercontent.com/assets/2994509/5140331/5d609b50-718b-11e4-90e7-0158e209aad0.png)