Auto merge of #4480 - integer32llc:explain-labels, r=matklad
authorbors <bors@rust-lang.org>
Sun, 10 Sep 2017 18:20:03 +0000 (18:20 +0000)
committerbors <bors@rust-lang.org>
Sun, 10 Sep 2017 18:20:03 +0000 (18:20 +0000)
Add an explanation of the labels

As requested @matklad! ❤️ Are there any questions you have about the labels that remain unanswered?


Trivial merge