senny/rbenv.el — pull request #5 by johnbellone (2013-07-17 13:40:46+00:00)
Title: Add a variable to the Ruby shim in the rbenv installation.

For some major modes they maintain their own list or variables to the ruby interpreters. The main one that comes to mind is the enhanced-ruby-mode. A better path may be to actually refactor this, but I do not see any harm adding this variable in the meanwhile.