More doctest fixes

Author: hansthen

Doc/library/argparse.rst

@@ -1186,6 +1186,7 @@ To specify ``choices`` before conversion, set the flag ``convert_choices``.
    ...                     choices=['mo', 'tu', 'we', 'th', 'fr', 'sa', 'su'],
    ...                     convert_choices=True,
    ...                     type=to_dow)
+   _StoreAction(option_strings=[], dest='when', nargs=None, const=None, default=None, type=<function to_dow at 0x7f3ff4d0ebd0>, choices=['mo', 'tu', 'we', 'th', 'fr', 'sa', 'su'], convert_choices=True, required=True, help=None, metavar=None, deprecated=False)
    >>> parser.print_help()
    usage: sphinx-build [-h] {mo,tu,we,th,fr,sa,su}
 
@@ -1194,6 +1195,7 @@ To specify ``choices`` before conversion, set the flag ``convert_choices``.
 
    options:
      -h, --help            show this help message and exit
+   >>>
 
 .. versionadded:: next