Grunt build break with warning, & ask for force usage

NOT AN ERROR!!

Grunt Build breaks,
Usage of ! operator, & missing semi-colon;
![screenshot from 2014-04-20 12 00 27](https://cloud.githubusercontent.com/assets/1175631/2750171/3a169736-c857-11e3-8bfb-c7c0aba5975b.png)