intridea/omniauth — pull request #749 by matthewrudy (2014-06-11 03:50:51+00:00)
Title: Require RuboCop >= 0.23

The capitalisation changed between 0.22 and 0.23.

Also, remove any differences between the `Gemfile.rack-1.3.x` and `Gemfile`.
They should be the same except for the rack version.