twitter/bootstrap — pull request #900 by ansman (2012-01-05 20:56:41+00:00)
Title: Added a way of specifying a custom class for the twipsy

Before there was no way of applying a style on a per twipsy basis (my need comes from having to nudge a twipsy a bit).

I've now added an extra option called `class` which, if specified, will be added to the twipsy in the `show` method.

I also added a simple test case for this that verifies that the class is actually being added.