rspec/rspec-core — pull request #494 by myronmarston (2011-11-03 06:46:51+00:00)
Title: Don't error out when config.mock_with or expect_with is re-specifying the current config

This is a fix for #490. My past attempts at dealing with the ruby 1.9 bug that can cause infinite recursion have caused frustration/pain/annoyance for users so I'm a bit wary to merge this in without a review from someone else.