py domain: `None` is no longer hyperlinked after 4.4.0

[Harmon758]

Describe the bug

Since Sphinx 4.4.0, None is no longer hyperlinked.

I think this might be in all cases, but I've noticed it in the case where it's used as one of the types for a parameter through a docstring, using autodoc and napoleon (and intersphinx).

Sphinx 4.4.0 is the first version this started happening in, and it's persisted in every version since.

I think I've been able to narrow it down as due to 5da68c3 (#10021).

How to Reproduce

With Sphinx 4.3.2:

$ git clone https://github.com/tweepy/tweepy
$ cd tweepy
$ pip install -r requirements.txt
$ cd docs
$ make html
$ # open _build/html/client.html and see None properly hyperlinked

With Sphinx 4.4.0:

$ git clone https://github.com/tweepy/tweepy
$ cd tweepy
$ pip install -r requirements.txt
$ cd docs
$ make html
$ # open _build/html/client.html and see None not hyperlinked

Your project

https://github.com/tweepy/tweepy

OS

Microsoft Windows [Version 10.0.19043.1889]

Python version

Python 3.10.0 (tags/v3.10.0:b494f59, Oct 4 2021, 19:00:18) [MSC v.1929 64 bit (AMD64)] on win32

Sphinx version

4.4.0 and newer

Sphinx extensions

hoverxref.extension
myst_parser
sphinx.ext.autodoc
sphinx.ext.autosectionlabel
sphinx.ext.intersphinx
sphinx.ext.napoleon
sphinx_search.extension
sphinx_tabs.tabs

[AA-Turner]

Do you have a single minimal rst/py file that shows the bug please?

[Harmon758]

I don't have a complete minimal example at the moment, but is it necessary for me to go through the process of setting one up?

Like I said, I was able to pinpoint the issue to a specific commit, 5da68c3. I'm not familiar with the make_xref method that it changed, but it seems like #10021 changed how None is handled?

When I've noticed it is when a Python method has something like this in its docstring:

        Parameters
        ----------
        parameter_name : str | None

[AntoineD]

I also have the same issue, this happens when autodoc_typehints = "description".

[vivodi]

I can confirm this issue. Is there any workaround?