[libcxx-commits] [libcxx] [libc++] Added `[[nodiscard]]` to `fstream.native_handle`, `span.at` and `in/out_ptr` (PR #167097)

[Hristo Hristov via libcxx-commits]

https://github.com/H-G-Hristov edited https://github.com/llvm/llvm-project/pull/167097