https://bugs.python.org/review/9694/diff/13424/Doc/library/argparse.rst File Doc/library/argparse.rst (right): https://bugs.python.org/review/9694/diff/13424/Doc/library/argparse.rst#newc... Doc/library/argparse.rst:1711: "positional arguments" and "options" when displaying help Maybe I should also add a “Changed in version 3.5” notice for this https://bugs.python.org/review/9694/