Fix detection for out of date files

[marxin]

Fix detection when targets are out of date.

Fixes #9359.

[tk0miya]

Thank you for your proposal. It seems some tests are failed. Could you check them please?

[marxin]

Well, I am not fully sure why the tests fail. I removed 2x shared_result which fixed some tests.
Apart from that I see:

app = <SphinxTestApp buildername='texinfo'>, status = <_io.StringIO object at 0x7ffff0876a60>, warning = <_io.StringIO object at 0x7ffff0876af0>

    @pytest.mark.sphinx('texinfo', testroot='markup-rubric')
    def test_texinfo_rubric(app, status, warning):
        app.build()
        print(app)
    
>       output = (app.outdir / 'python.texi').read_text()

tests/test_build_texinfo.py:74: 

but when I run only a single test, it works fine pytest tests/test_build_texinfo.py. So it's likely about sharing SphinxTestApp among tests? Can you please help me?

[marxin]

I've got a tentative patch that works. But as said, I'm not much experienced with Sphinx.

[marxin]

@tk0miya May I please ping this pull request?

[marxin]

May I please ping this pull request?

[marxin]

Rebased this pull request. Is it something @AA-Turner can take a look at, please?

[AA-Turner]

Please add a CHANGES entry

A

[marxin]

Please add a CHANGES entry

Done.

[AA-Turner]

Thanks @marxin!

A

[marxin]

I thank you!