Auto merge of #3760 - sanmai-NL:Cargo_new_gitignore_rustfmt_.rs.bk, r=alexcrichton
authorbors <bors@rust-lang.org>
Mon, 27 Feb 2017 10:44:14 +0000 (10:44 +0000)
committerbors <bors@rust-lang.org>
Mon, 27 Feb 2017 10:44:14 +0000 (10:44 +0000)
Add `src/**/*.rs.bk` to VCS ignore file

See #2409, specifically https://github.com/rust-lang/cargo/pull/2409#issuecomment-281707650.

Also limit `target` exclusion to `target/` (dirs) as expected.


Trivial merge