thoughtbot/shoulda-matchers — pull request #267 by fullbridge-batkins (2013-03-20 16:42:00+00:00)
Title: Req'ing 'rspec/core' isntead of 'rspec' on the RSpec integration file

As per discussed on #259 with @mxie, this should get rid of the need for RSpec-Rails users to add `gem 'rspec'` to their `Gemfile`, while still allowing the RSpec integration file to do initialization.