[libcxx-commits] [libcxx] [libc++] Port #200996 to ostream (PR #226372)

[A. Jiang via libcxx-commits]

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

I think this approach is OK. But perhaps @philnik777 prefers another approach. Maybe we can track this in a follow-up issue/PR.

https://github.com/llvm/llvm-project/pull/226372