[ci skip] Make last note show up in postgresql guide.

Before:

![screenshot 2014-05-29 17 24 39](https://cloud.githubusercontent.com/assets/1000669/3116067/3e428f4c-e713-11e3-84b5-300e3bd6b70e.png)

After:

![screenshot 2014-05-29 17 25 32](https://cloud.githubusercontent.com/assets/1000669/3116068/3f44fede-e713-11e3-90b3-2d44ff4df02d.png)