Code review comment for lp:~fgimenez/snappy/udf-revision

I'm getting this error when a revision flag is given:

$ go run _integration-tests/main.go -revision=-1
Building tests...
go test -c ./_integration-tests/tests
Writing test config...
{_integration-tests/data/output/testconfig.json rolling edge false false false}
Creating image...
sudo ubuntu-device-flash --verbose --revision -1 core rolling --output /tmp/snappy-test/image/snappy-rolling-edge--1.img --channel edge --developer-mode
expected argument for flag `--revision', but got option `-1'

Never used this revision flag before :) it'll be useful for sure for automated upgrade tests