[3.12] gh-121196: Document `dict.fromkeys` params as pos-only (GH-121197)#121243

sobolevn merged 1 commit intopython:3.12python/cpython:3.12from

miss-islington:backport-1dc9a4f-3.12miss-islington/cpython:backport-1dc9a4f-3.12Copy head branch name to clipboard