[libcxx-commits] [libcxx] [libc++][ranges] Updated `[[nodiscard]]` implementation for `subrange` and `join_with_view` (PR #176936)

[Louis Dionne via libcxx-commits]

https://github.com/ldionne approved this pull request.

LGTM but could you please update the Coding Guidelines to add a sentence about relational operators (or functions where the compiler generates a diagnostic already) and nodiscard?

https://github.com/llvm/llvm-project/pull/176936