style: indentation tweak

Author: xen0n

.travis.yml

@@ -50,7 +50,7 @@ matrix:
   # netbsd currently doesn't build (because of nix-0.9.0)
   env:  # important: https://docs.travis-ci.com/user/customizing-the-build/#rows-that-are-allowed-to-fail
   allow_failures:
-      - env: TARGET=x86_64-unknown-netbsd DISABLE_TESTS=1
+    - env: TARGET=x86_64-unknown-netbsd DISABLE_TESTS=1
 
 before_install:
   - set -e