Fix indentation of code example/tests in docs (including `docstrings`)

[griff-rees]

See download_data doc formatting in https://living-with-machines.github.io/alto2txt2fixture/reference/alto2txt2fixture/create_adjacent_tables/

[griff-rees]

Looks like sphinx Examples style isn't supported in mkdocstrings: as it hasn't been implemented in the griffe parser.

[pawamoy]

Is :Examples: documented somewhere? I didn't know this existed 🙂

[griff-rees]

Ah thanks for the comment and for all your work on this! I was actually following this issue. Can look up an example elsewhere if that's helpful?

[pawamoy]

Sure, if you can find one, that would be great, thanks! I'd recommend switching to another docstring style though, as the Sphinx one will never be as well supported as the other ones (Google/Numpy) 😅

[griff-rees]

Thanks again @pawamoy. I stuck some examples (of... Example...) up on mkdocstrings/griffe#7. Closing this now I've re-written everything for Google style ;) in #35.