Auto merge of #4812 - tomprince:patch-1, r=matklad
authorbors <bors@rust-lang.org>
Tue, 12 Dec 2017 20:25:27 +0000 (20:25 +0000)
committerbors <bors@rust-lang.org>
Tue, 12 Dec 2017 20:25:27 +0000 (20:25 +0000)
Fix comment typo.


Trivial merge