Fix formatting of list in HiLo's 'Setting Variables' step

Just fixing a little markdown accident someone made in the past.

### Before

![screen shot 2014-03-12 at 11 12 49 pm](https://f.cloud.github.com/assets/1041691/2406726/f4f08f92-aa77-11e3-8c96-d7df8f48442a.png)

### After

![screen shot 2014-03-12 at 11 12 30 pm](https://f.cloud.github.com/assets/1041691/2406728/0311a174-aa78-11e3-81cc-6f20e1acf8e2.png)