argerim/select2-rails — pull request #102 by newdark (2014-10-06 23:24:16+00:00)
Title: Update select2-bootstrap.css

A group has done some of the work to help out with making this bootstrap like. There are a few more features as well as some other cool peaces in this css change. I would recommend using this in your gem.

https://fk.github.io/select2-bootstrap-css/