def test_usage() -> None:
    ' Usage '
    (rv, out) = getstatusoutput(RUN)
    assert (rv > 0)
    assert out.lower().startswith('usage:')
Usage
def test_usage() -> None:
    '  '
    (rv, out) = getstatusoutput(RUN)
    assert (rv > 0)
    assert out.lower().startswith('usage:')