Auto merge of #2757 - alexcrichton:panic-profile-dox, r=brson
authorbors <bors@rust-lang.org>
Sat, 11 Jun 2016 01:32:24 +0000 (18:32 -0700)
committerGitHub <noreply@github.com>
Sat, 11 Jun 2016 01:32:24 +0000 (18:32 -0700)
Document the `panic` profile option

Closes #2750


Trivial merge