Created by: jpommerening
Yes, I know.. you already had that one: https://github.com/twitter/bootstrap/pull/4340
This pull request is about the same, but it is backwards compatible at the cost of a few bytes.
(Sorry for the early post. Clumsy me.)
Edit/PS: If you need the pull-request based on another branch or if the patch needs some more work, just let me know.