[3.14] gh-54732: Make argparse error caused by empty rows in option files explicit (GH-136795)#136818

AA-Turner merged 1 commit intopython:3.14python/cpython:3.14from

miss-islington:backport-8ffc3ef-3.14miss-islington/cpython:backport-8ffc3ef-3.14Copy head branch name to clipboard