Auto merge of #2826 - KaivoAnastetiks:fix/no-subcommand-name, r=alexcrichton
authorbors <bors@rust-lang.org>
Tue, 5 Jul 2016 15:17:32 +0000 (08:17 -0700)
committerGitHub <noreply@github.com>
Tue, 5 Jul 2016 15:17:32 +0000 (08:17 -0700)
Display the name of the unknown subcommand.

?r @alexcrichton
Fixes #2825


Trivial merge