[3.14] gh-141984: Reword and reorganize Subscription (and Slicing) docs (GH-141985)#144476

encukou merged 1 commit intopython:3.14python/cpython:3.14from

miss-islington:backport-e423e0c-3.14miss-islington/cpython:backport-e423e0c-3.14Copy head branch name to clipboard