Work around CPython bug in HTTPError

[Zac-HD]

Workaround for python/cpython#98778 (aka python/cpython#90113), in order to fix pytest-dev/pytest#10797.

This is a little ugly but I thought we'd prefer to keep it tightly scoped rather than suppressing anything raised by getattr().

[coveralls]

Pull Request Test Coverage Report for Build 4399424903

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 236 unchanged lines in 5 files lost coverage.
• Overall coverage decreased (-0.3%) to 65.224%

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Files with Coverage Reduction	New Missed Lines	%
/opt/hostedtoolcache/PyPy/3.8.16/x64/lib/pypy3.8/site-packages/exceptiongroup/_exceptions.py	1	89.86%
/opt/hostedtoolcache/Python/3.7.15/x64/lib/python3.7/site-packages/exceptiongroup/_formatting.py	45	69.68%
/opt/hostedtoolcache/Python/3.8.16/x64/lib/python3.8/site-packages/exceptiongroup/_formatting.py	45	69.87%
/opt/hostedtoolcache/Python/3.9.16/x64/lib/python3.9/site-packages/exceptiongroup/_formatting.py	46	69.87%
/opt/hostedtoolcache/PyPy/3.8.16/x64/lib/pypy3.8/site-packages/exceptiongroup/_formatting.py	99	16.99%

Totals
Change from base Build 4115259050:	-0.3%
Covered Lines:	2065
Relevant Lines:	3166

---

💛 - Coveralls

[agronholm]

I'm a bit confused. There was only a new test added?

[Zac-HD]

I wanted to see CI fail on old versions before pushing the fix, and... it's not failing yet 😅

[Zac-HD]

@agronholm done, albeit with two more commits than I'd planned.

[agronholm]

Thanks!

[agronholm]

I almost missed the wrong hyperlink format in the changelog. Fixing.

[agronholm]

Released v1.1.1.