twitter/typeahead.js — pull request #538 by DarDar (2013-12-03 03:48:42+00:00)
Title: Copy classes from the source input to hint for compatibility with Bootstrap 3.0

Bootstrap [requires now](http://getbootstrap.com/getting-started/#migration-notes) `.form-control` class for inputs to be styled properly. The best way to add this class to the hint input is to copy it from the source input.
This approach makes possible to add typeahead to `.input-sm` and `.input-lg` controls also.