solanolabs/webdriver-firefox — pull request #1 by pivotal-casebook (2013-08-13 18:06:31+00:00)
Title: Change RbConfig from a class to a module

RbConfig is a module and not a class (http://www.ruby-doc.org/stdlib-2.0/libdoc/rubygems/rdoc/RbConfig.html) and changing it to a module works with bundle install.