Remove trailing slashes from intersphinx inventory URLs

[Viicos]

From the Sphinx output:

loading intersphinx inventory 'devguide' from https://devguide.python.org//objects.inv ...
loading intersphinx inventory 'mypy' from https://mypy.readthedocs.io/en/latest//objects.inv ...
loading intersphinx inventory 'packaging' from https://packaging.python.org/en/latest//objects.inv ...
loading intersphinx inventory 'py3.11' from https://docs.python.org/3.11//objects.inv ...
loading intersphinx inventory 'py3.12' from https://docs.python.org/3.12//objects.inv ...
loading intersphinx inventory 'py3.13' from https://docs.python.org/3.13//objects.inv ...
loading intersphinx inventory 'py3.14' from https://docs.python.org/3.14//objects.inv ...
loading intersphinx inventory 'python' from https://docs.python.org/3//objects.inv ...
loading intersphinx inventory 'trio' from https://trio.readthedocs.io/en/latest//objects.inv ...
loading intersphinx inventory 'typing' from https://typing.readthedocs.io/en/latest//objects.inv ...
intersphinx inventory has moved: https://packaging.python.org/en/latest//objects.inv -> https://packaging.python.org/en/latest/objects.inv
intersphinx inventory has moved: https://typing.readthedocs.io/en/latest//objects.inv -> https://typing.readthedocs.io/en/latest/objects.inv
intersphinx inventory has moved: https://mypy.readthedocs.io/en/latest//objects.inv -> https://mypy.readthedocs.io/en/latest/objects.inv
intersphinx inventory has moved: https://trio.readthedocs.io/en/latest//objects.inv -> https://trio.readthedocs.io/en/latest/objects.inv

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📚 Documentation preview 📚: https://pep-previews--4239.org.readthedocs.build/

[AA-Turner]

I think this is a bug in Sphinx 8.1 that is fixed in 8.2. I will check (if so, we don't need to merge this)

[Viicos]

You mean Sphinx will check if there's a trailing slash, and conditionally append /objects.inv or objects.inv?

[hugovk]

Yes, it's a Sphinx 8.0 bug fixed in Sphinx 8.1 -- I know because at one point I was going to submit a PR to fix it in Sphinx but saw it had already been fixed :)

Running Sphinx v8.0.2
loading translations [en]... done
making output directory... done
loading intersphinx inventory 'python' from https://docs.python.org/3//objects.inv ...
loading intersphinx inventory 'packaging' from https://packaging.python.org/en/latest//objects.inv ...
loading intersphinx inventory 'typing' from https://typing.readthedocs.io/en/latest//objects.inv ...
loading intersphinx inventory 'trio' from https://trio.readthedocs.io/en/latest//objects.inv ...
loading intersphinx inventory 'devguide' from https://devguide.python.org//objects.inv ...
loading intersphinx inventory 'py3.11' from https://docs.python.org/3.11//objects.inv ...
loading intersphinx inventory 'py3.12' from https://docs.python.org/3.12//objects.inv ...
loading intersphinx inventory 'py3.13' from https://docs.python.org/3.13//objects.inv ...
loading intersphinx inventory 'py3.14' from https://docs.python.org/3.14//objects.inv ...

Running Sphinx v8.1.3
loading translations [en]... done
making output directory... done
loading intersphinx inventory 'python' from https://docs.python.org/3/objects.inv ...
loading intersphinx inventory 'packaging' from https://packaging.python.org/en/latest/objects.inv ...
loading intersphinx inventory 'typing' from https://typing.readthedocs.io/en/latest/objects.inv ...
loading intersphinx inventory 'trio' from https://trio.readthedocs.io/en/latest/objects.inv ...
loading intersphinx inventory 'devguide' from https://devguide.python.org/objects.inv ...
loading intersphinx inventory 'py3.11' from https://docs.python.org/3.11/objects.inv ...
loading intersphinx inventory 'py3.12' from https://docs.python.org/3.12/objects.inv ...
loading intersphinx inventory 'py3.13' from https://docs.python.org/3.13/objects.inv ...
loading intersphinx inventory 'py3.14' from https://docs.python.org/3.14/objects.inv ...

We need to resolve #4087 before moving to 8.1+.

[hugovk]

sphinx-doc/sphinx#12782 / sphinx-doc/sphinx#12807 is the Sphinx 8.1.0 fix.

[Viicos]

Thanks @AA-Turner @hugovk, I'll close this one :)