travis: use gofmt simplify flag

Author: julienschmidt

.travis.yml

@@ -12,6 +12,6 @@ before_install:
 script:
   - go test -v -covermode=count -coverprofile=coverage.out
   - go vet ./...
-  - test -z "$(gofmt -d . | tee /dev/stderr)"
+  - test -z "$(gofmt -d -s . | tee /dev/stderr)"
   - test -z "$(golint ./... | tee /dev/stderr)"
   - $HOME/gopath/bin/goveralls  -coverprofile=coverage.out -service=travis-ci