python_version != is incorrectly normalized

[charliermarsh]

On main, this passes:

assert_normalizes_to(
    "python_version != '3.8' and python_version < '3.10'",
    "python_version < '3.8' and python_version < '3.10' and python_version > '3.8'",
);

But the second term is not equivalent. It should be python_version < '3.10' and (python_version < '3.8' or python_version > '3.8').

[charliermarsh]

\cc @ibraheemdev