And per [IRC](https://botbot.me/freenode/gittip/msg/4959515/), here's the difference it makes:

![screen shot 2013-08-03 at 1 35 55 pm](https://f.cloud.github.com/assets/134455/905980/5b082a10-fc63-11e2-8241-2b7fb739d5d8.png)

![screen shot 2013-08-03 at 1 37 00 pm](https://f.cloud.github.com/assets/134455/905981/5dd54e58-fc63-11e2-8654-67b0587a6894.png)