Auto merge of #5206 - lukaslueg:patch-1, r=matklad
authorbors <bors@rust-lang.org>
Tue, 20 Mar 2018 13:27:30 +0000 (13:27 +0000)
committerbors <bors@rust-lang.org>
Tue, 20 Mar 2018 13:27:30 +0000 (13:27 +0000)
Update CONTRIBUTING.md

Since a13a33c33b049a7b412f0cc80a7b166b0d58345c code is rejected during CI if `rustfmt` complains. Update the docs regarding that fact.


Trivial merge