travis: allow rustfmt to fail

I'm on the fence about this, but I have to admit that having your PR fail
because of formatting issues isn't a great experience for new contributors.

We will need to run `cargo fmt` ourselves on a regular basis.

diff --git a/.travis.yml b/.travis.yml
index e12f11185e5c3460e0a277ecaebad14d5c2343c1..da26702751d48efa58b2d5792594e9b9bfefec56 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,4 +13,5 @@ matrix:
         - cargo fmt -- --check
   allow_failures:
     - rust: nightly
+    - env: RUSTFMT
 script: cargo test --release --verbose --all