rspec/rspec-core — pull request #1689 by tomykaira (2014-08-31 01:14:41+00:00)
Title: Modularize NullColorizer

Other colorizers s.t. ConsoleCodes are module with module_functions.
NullColorizer was a class and the class does not respond to `wrap()`. This
patch fixes the mismatch.

I approached a problem about NullColorizer in PR #1637, but the fix was not complete.
I am sorry about my carelessness.