[smart_holder] git merge master after clang-format etc#3735

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rwgk wants to merge 29 commits intopybind:smart_holderfrom

rwgk:sh_merge_master_after_clang-format_etc

Commits on Feb 6, 2022

Commits on Feb 7, 2022

Minor change to improve readability (#3695)
Skylion007
authored

Commits on Feb 8, 2022

fix: __index__ on Enum should always be present. (#3700)
henryiii
authored
Manual fix-ups in preparation for clang-tidy readability-braces-around-statements.
rwgk
committed
Adding .clang-tidy readability-braces-around-statements option.
rwgk
committed

Commits on Feb 11, 2022

Commits on Feb 12, 2022

chore: drop Python 3.5 (#3719)

authored