Return extra empty line in blob render

before:
![](http://puu.sh/bcwxg/eaf300f2c3.png)
![](http://puu.sh/bcwDv/db2b3e6f88.png)

after:
![](http://puu.sh/bcwxg/eaf300f2c3.png)
![](http://puu.sh/bcwGZ/14e11e1031.png)