[3.13] gh-128067: Fix pyrepl overriding printed output without newlines (GH-138732)#143351

ambv merged 3 commits intopython:3.13python/cpython:3.13from

miss-islington:backport-8a2deea-3.13miss-islington/cpython:backport-8a2deea-3.13Copy head branch name to clipboard