fixed prettify google if you have put the language in code block markdow...

For fix problem of class name.

![schermata 2013-10-07 alle 18 23 54](https://f.cloud.github.com/assets/104249/1282832/ee86081c-2f7a-11e3-9997-40614f240a98.png)
![schermata 2013-10-07 alle 18 21 55](https://f.cloud.github.com/assets/104249/1282833/eed79ace-2f7a-11e3-8709-64ef286256a9.png)