rspec/rspec-core — pull request #1087 by iamvery (2013-09-27 14:25:20+00:00)
Title: Use explicit conversion methods for stringified numbers

* As @greggroth pointed out in rspec/rspec-core#1086, the formatter
does not work as expected when the mathn lib is loaded. This lib adds
the Rational type which is formatted as "n/n" when stringified rather
than the float form. By explicitly converting the arithmetic to the
types we wish to stringify, this display is corrected.

[#1086]

--

The concern @greggroth and I have is now the spec suite is running w/ mathn loaded which is most likely not going to be the use case of many end users. How even do we isolate this spec?