Auto merge of #4344 - froydnj:cargo-rustc-spelling-fixes, r=alexcrichton
authorbors <bors@rust-lang.org>
Mon, 31 Jul 2017 20:31:58 +0000 (20:31 +0000)
committerbors <bors@rust-lang.org>
Mon, 31 Jul 2017 20:31:58 +0000 (20:31 +0000)
fix some spelling errors in cargo_rustc


Trivial merge