twitter/bootstrap — pull request #612 by scottkf (2011-11-11 19:25:29+00:00)
Title: Added mixin for bordered arrows

So you can get borders that look like this:

[![http://i.minus.com/ibmuYBGrlkwrTP.png](example)](http://i.minus.com/ibmuYBGrlkwrTP.png)

By using the mixin this way:

```css
.arrow {
#borderArrow > .below(15px, 1px, @color, #f9f9f9);
}
```

Given this HTML:

```html

```