[libcxx-commits] [libcxx] [libc++][windows] Use _wsetlocale() in __locale_guard (PR #160479)

[Nikolas Klauser via libcxx-commits]

https://github.com/philnik777 commented:

Please provide a test to ensure we don't regress on this.

https://github.com/llvm/llvm-project/pull/160479