@AlexWaygood and @ambv: Status check is done, and it's a success ✅ .

This is fun! @ambv, it appears that attempting to backport these new tests to 3.9 has uncovered a bug in the 3.9 branch, where staticmethod and classmethod singledispatchmethods don't properly wrap the docstrings or names of the target function. Would the best course of action be to:

1. Abandon backporting this to 3.9?
2. Apply a bugfix along with the new tests to 3.9, linking to the same BPO issue?
3. Create a new BPO issue for a bugfix?

Definitely worth fixing. Since you're not a committer (yet?), you won't be able to patch this PR so you can essentially recreate it as part of the fix. The fix can be part of this same BPO.

Definitely worth fixing. Since you're not a committer (yet?), you won't be able to patch this PR so you can essentially recreate it as part of the fix. The fix can be part of this same BPO.

Great, I'll get to work on a fix!

Closing in favor of GH-29394.