[3.6] bpo-34864: warn if "Prefer tabs when opening documents" set to "Always" (GH-10464)#11014

miss-islington merged 1 commit intopython:3.6python/cpython:3.6from

miss-islington:backport-9ebe879-3.6miss-islington/cpython:backport-9ebe879-3.6Copy head branch name to clipboard