Backported upstream fix for gh-99553

[agronholm]

Fixes #50.

[coveralls]

Pull Request Test Coverage Report for Build 3664586388

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 75 unchanged lines in 6 files lost coverage.
• Overall coverage increased (+0.03%) to 65.497%

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Files with Coverage Reduction	New Missed Lines	%
/opt/hostedtoolcache/Python/3.10.8/x64/lib/python3.10/site-packages/exceptiongroup/_exceptions.py	5	96.4%
/opt/hostedtoolcache/Python/3.7.15/x64/lib/python3.7/site-packages/exceptiongroup/_exceptions.py	5	96.24%
/opt/hostedtoolcache/Python/3.8.15/x64/lib/python3.8/site-packages/exceptiongroup/_exceptions.py	5	96.4%
/opt/hostedtoolcache/Python/3.9.15/x64/lib/python3.9/site-packages/exceptiongroup/_exceptions.py	5	96.4%
/opt/hostedtoolcache/PyPy/3.8.13/x64/lib/pypy3.8/site-packages/exceptiongroup/_exceptions.py	14	89.93%
/opt/hostedtoolcache/Python/3.11.0/x64/lib/python3.11/site-packages/exceptiongroup/_exceptions.py	41	0%
<!--	Total:	75		-->

Totals
Change from base Build 3664500682:	0.03%
Covered Lines:	2054
Relevant Lines:	3136

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💛 - Coveralls

[agronholm]

@Zac-HD might you be available to review this? It fixes the 3.11 test job.

[agronholm]

Thanks for the review! There's another PR (#52) which is blocking a new major release, if you want to review that too. The submitter of the issue has not had time to do that.