Auto merge of #2788 - Manishearth:improve-help, r=alexcrichton
authorbors <bors@rust-lang.org>
Sun, 19 Jun 2016 22:10:59 +0000 (15:10 -0700)
committerGitHub <noreply@github.com>
Sun, 19 Jun 2016 22:10:59 +0000 (15:10 -0700)
Clarify where full list of subcommands can be found

None


Trivial merge