rr/rr — pull request #42 by amatsuda (2013-07-23 10:06:31+00:00)
Title: Use ::RSpec.configuration.backtrace_exclusion_patterns instead of backtrace_clean_patterns when available

`::RSpec.configuration.backtrace_clean_patterns` has been deprecated since 2.14 and was renamed to `backtrace_exclusion_patterns` in 3.0

see: https://github.com/rspec/rspec-core/commit/b4be678