GH-130608: Remove `dirs_exist_ok` argument from `pathlib.Path.copy()` by barneygale · Pull Request #130610 · python/cpython

Hi Paul, I requested your review because you helped with a similar PR few months back: #123337

To explain my motivations a bit:

I'm trying to be extremely careful about adding pathlib features I might later regret. It's already happened more than once while I've been maintaining pathlib 🙃

In this case, the implementation uses WritablePath.mkdir(exist_ok=dirs_exist_ok), but I'd like to remove the exist_ok argument because it implies readability, whereas WritablePath is otherwise write-only. Maybe this is solvable some other way, but for now I'd quite like to play it safe.

Hope that makes sense, thank you.