[3.8] bpo-33725, multiprocessing doc: rephase warning against fork on macOS (GH-13841)#13849

miss-islington merged 1 commit intopython:3.8python/cpython:3.8from

miss-islington:backport-1e77ab0-3.8miss-islington/cpython:backport-1e77ab0-3.8Copy head branch name to clipboard