Non-existing class in importlib

[pchanial]

Documentation

The documentation for 3.9 and 3.10 about the importlib package mentions the class importlib.resources.abc.Traversable, which only exists since 3.11. Instead, the importlib.abc.Traversable should be mentionned.

[jaraco]

My intention was always for this class to be in the resources namespace, but that didn't happen until #90276. My preference, for maximum compatibility, would be to expose the class in importlib.resources.abc even for old Pythons, to honor the documented location, but I realize now that's not readily achievable because importlib.resources is a simple module prior to Python 3.11 and thus doesn't support submodules. In #93610 (comment), I indicated that I meant for the location of Traversable to be an implementation detail prior to 3.11.

[jaraco]

Docs have been updated to reflect the reality of the situation.