Correct spacing around configuration link

from: 
![screen shot 2014-10-20 at 7 27 46 pm](https://cloud.githubusercontent.com/assets/6004309/4712211/4f39b9dc-58ca-11e4-8faa-6bbeba3dcdc4.png)

to: 
![screen shot 2014-10-20 at 7 28 35 pm](https://cloud.githubusercontent.com/assets/6004309/4712212/56ffc9f4-58ca-11e4-8d16-c8da46bd8627.png)