Fix test_reference_implicit_with_code_inlinehilite_python

[davide125]

Fix the test with the latest pymdownx

[davide125]

Ah if this needs to support multiple versions we might have to somehow make it conditional

[pawamoy]

Thanks! We can simply dev-depend on a recent enough pymdownx version 🙂 Asserting the output in our own tests suite shouldn't affect actual features or users, which can use older pymdownx versions. But please wait a bit before working on this: I have a few unpushed commits that are touching to both pyproject.toml and the tests suite.