twitter/bootstrap — pull request #3953 by chrisdpratt (2012-06-27 23:17:07+00:00)
Title: Allow alternate text for assistive devices in icon tags

When you have a button containing only an icon (such as just displaying a magnifying glass to indicate the submit button for a search input), there's no alternate display for assistive devices. This can be accounted for by placing text within the `` tag, but Bootstrap does not currently visually hide text within an `` tag.

See: http://jsfiddle.net/chrisdpratt/N2xym/

The first group of buttons shows what happens currently when text is placed inside an `` tag. The second group shows the display after the suggested change.