CapnKernul/minitest-reporters — pull request #40 by os97673 (2012-11-13 19:43:32+00:00)
Title: Let's use filter_backtrace().join(n)  to format backtrace for RM

form_backtrace() has been removed in the resent version of Rake::TeamCity::RunnerCommon, and it looks like a good idea to use filter_backtrace().join("\n").