Remove trailing newline from links to releases

Links with a trailing newline/space in them are rendered weirdly, especially when you display `border-bottom` on hover.

#### Before

![screen shot 2013-09-15 at 19 51 26](https://f.cloud.github.com/assets/315596/1145659/7aa918a8-1e27-11e3-9332-081efd459b3f.png)

#### After

![screen shot 2013-09-15 at 19 51 37](https://f.cloud.github.com/assets/315596/1145660/80a8d694-1e27-11e3-87d9-c4a1a2cb6236.png)