fix the linter and add more checks

[fchapoton]

📚 Description

this is fixing, once again, the just-recently broken linter

📝 Checklist

• The title is concise, informative, and self-explanatory.
• The description explains in detail what this PR is about.
• I have linked a relevant issue or discussion.
• I have created tests covering the changes.
• I have updated the documentation accordingly.

⌛ Dependencies

[dimpase]

a doctest error is introduced.

File "sage_setup/autogen/interpreters/__init__.py", line 163, in sage_setup.autogen.interpreters.build_interp
Failed example:
    with open(testdir + '/interp_rdf.c') as f:
        f.readline()
Expected:
    '/* Automatically generated by ... */\n'
Got:
    '/* Automatically generated by /__w/sage/sage/src/sage_setup/autogen/interpreters/generator.py.  Do not edit!\n'

Also, what's the reason to change linter codes to be checked?

[fchapoton]

Thanks. It should be better now. Adding new checks was an opportunity, as they were failing only a few times each.

[github-actions]

Documentation preview for this PR (built with commit 0552f74) is ready! 🎉