strategies.py

        ]
    )
    whitespace = sampled_from(
        [
            # maybe no whitespace at all
            b""
            # or maybe some
            b" ",
            b"\t",
            b"\n",
            b"\r\n",
        ]
    )

    return builds(
        lambda leading, key, trailing: leading + key + trailing,
        whitespace,
        keys,
        whitespace,
    )