different functions which require different kinds of command-line arguments.
:class:`ArgumentParser` supports the creation of such sub-commands with the
:meth:`add_subparsers` method. The :meth:`add_subparsers` method is normally
- called with no arguments and returns an special action object. This object
+ called with no arguments and returns a special action object. This object
has a single method, :meth:`~ArgumentParser.add_parser`, which takes a
command name and any :class:`ArgumentParser` constructor arguments, and
returns an :class:`ArgumentParser` object that can be modified as usual.