rspec/rspec-core — pull request #1701 by myronmarston (2014-09-10 06:18:28+00:00)
Title: Fix another regression in rake task pattern handling.

Apparently `FileList[file_list_object]` works, and some
users used `task.pattern = FileList[…]`.

See https://github.com/rspec/rspec-core/commit/667a4ca00f50fddb3fca7cdfcaf97633ba267b1f#commitcomment-7725799