Remove useless slash

A slash character was injected right after the comment in the html, and it was visible on the web page.

Example:
![slash-in-the-html](https://f.cloud.github.com/assets/67230/1993373/80d80640-84d8-11e3-8d2e-c479e7d782ce.png)

This change removes that slash, so everything is clean again :)

BTW, Thanks for this plugin!