[libcxx-commits] [libcxx] [libc++] Fix `reverse_iterator` when underlying is c++20 `bidirectional_iterator` but not `Cpp17BidirectionalIterator` (PR #112100)

[A. Jiang via libcxx-commits]

https://github.com/frederick-vs-ja approved this pull request.

This also appears to reduce inlining burden on compilers. LGTM once test files get clang-formatted.

https://github.com/llvm/llvm-project/pull/112100