twitter/bootstrap — pull request #2476 by luk3thomas (2012-03-09 01:08:16+00:00)
Title: added ability to set custom colors for popover arrow mixin

I wanted set a custom color for an arrow w/ the mixin:
```
#popoverArrow > .top(5px, @red)
```
I couldn't because the color ```@black``` was hardcoded into the mixin.
I updated the ```mixins.less``` to allow custom colors for the popover arrow