[libcxx-commits] [libcxx] [libc++][NFC] Refactor basic_streambuf to use public API functions when possible (PR #144547)

[Nikolas Klauser via libcxx-commits]

https://github.com/philnik777 approved this pull request.

The private and public names are equally horrible, so LGTM.

https://github.com/llvm/llvm-project/pull/144547