How to use the betterbib.__version__ function in betterbib

outfile = tempfile.NamedTemporaryFile().name

    betterbib.cli.format([infile, outfile])

    with open(outfile, "r") as f:
        assert f.read() == (
            (
                "%comment{{This file was created with betterbib v{}.}}\n"
                "\n"
                "\n"
                "@article{{foobar,\n"
                " doi = {{foobar}},\n"
                " url = {{https://doi.org/foobar}},\n"
                "}}\n"
            ).format(betterbib.__version__)
        )

    os.remove(infile)
    os.remove(outfile)
    return

"}"
        )

    outfile = tempfile.NamedTemporaryFile().name

    betterbib.cli.dedup_doi([infile, outfile])
    with open(outfile, "r") as f:
        assert f.read() == (
            (
                "%comment{{This file was created with betterbib v{}.}}\n"
                "\n"
                "@article{{foobar,\n"
                " url = {{https://doi.org/foobar}},\n"
                "}}\n"
                "\n"
            ).format(betterbib.__version__)
        )

    os.remove(infile)
    os.remove(outfile)
    return