-h in priority

[nilgoyette]

When calling a binary, some users forget how some arguments work and simply add a -h to see the help again, without removing all parameters.

job a/long/path.gz another/long/path.gz a/long/path/again.gz -h

In some libs, like argparse, this prints the complete help message, as if you used job -h. With docopt-rs, it does print the usage message, but doesn't actually care about the -h. It would print the same thing with a non-existing parameter.

Invalid arguments.

Usage:
    job ...

tl;rd it would be nice to print the whole help message with -h, even if there are other args.