DOC: Code blocks hard to read

[larsoner]

In https://output.circle-artifacts.com/output/job/c66f057a-bc6d-4501-a922-6e64a27170f5/artifacts/0/html/auto_tutorials/evoked/20_visualize_evoked.html#sphx-glr-auto-tutorials-evoked-20-visualize-evoked-py from #12050 the highlighted text is black instead of white, inspected here:

This is not the case on the docs built 48h ago in https://mne.tools/dev/auto_tutorials/evoked/20_visualize_evoked.html#sphx-glr-auto-tutorials-evoked-20-visualize-evoked-py :

You can see it's pulling the text color from a different line in the CSS. We pin to pydata-sphinx-theme 0.13.3 and pygments does not appear to have made a release so I'm confused... any idea @drammock ?

[larsoner]

... I guess the data-theme="dark is not getting triggered for some reason

[larsoner]

I don't see this is mne.tools so I'm going to assume this was a transient issue but let's reopen if it happens again