mozilla/rust — pull request #14816 by theptrk (2014-06-11 03:30:43+00:00)
Title: Fix unclear wording of comment

The old comment left it unclear if this is creating a random value or doing a check as to whether or not the generator is available or some other operation.

See: http://stackoverflow.com/questions/24153311/when-is-rng-gen-not-true