twbs/bootstrap — pull request #9197 by alienlebarge (2013-08-07 13:02:24+00:00)
Title: Support for :invalid pseudo class

At the moment, there's no support for the [`:invalid`](https://developer.mozilla.org/en-US/docs/Web/CSS/:invalid) pseudo class as [it was in bootstrap 2](https://github.com/twbs/bootstrap/blob/master/less/forms.less#L367)