twitter/bootstrap — pull request #1039 by wrightlabs (2012-01-18 00:21:55+00:00)
Title: added styles so that form field states can be displayed in help text only

Only the color of the text is needed to indicate field state.
I needed this. I know I could have just extended my style on my local copy. But I thought I'd add to forms.less and submit it just for fun.