def standardise_python(code):
    """Ignore differences in black output.

    black 21.6b0 outputs slightly different source between Python 3.8 amd 3.9
    For tuples, it is not consistent adding round brackets.
    And sometimes there are fewer blank newlines.
    """
    return (
        code.replace("(", "").replace(")", "").replace("\n\n", "\n").replace(".0j", "j")
    )