bundler/bundler — pull request #3274 by zzak (2014-11-24 22:53:35+00:00)
Title: Use latest minor series of RG

RG 2.3 was never included in a release of Ruby, however the latest minor series(v2.4) will be included with the release of Ruby 2.2.

The latest version of RG in this series is currently 2.4.4.