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
Before fix, it's ignoring the white spaces. just like in  attachment.

![additional comments before](https://cloud.githubusercontent.com/assets/2994509/5139214/b40d793c-717c-11e4-85a6-ba6883661b58.png)