[3.9] Fix error in argparse documentation example (GH-17399) (GH-21992)

miss-islington · SarahPythonista · web-flow · commit 78ef1b6b124b · 2020-09-04T15:26:22.000-07:00
Automerge-Triggered-By: @rhettinger (cherry picked from commit 8784d33) Co-authored-by: SarahPythonista <4283226+SarahPythonista@users.noreply.github.com>
diff --git a/Doc/library/argparse.rst b/Doc/library/argparse.rst
@@ -1162,8 +1162,8 @@ keyword argument to :meth:`~ArgumentParser.add_argument`::
    >>> parser.parse_args(['--foo', 'BAR'])
    Namespace(foo='BAR')
    >>> parser.parse_args([])
-   usage: argparse.py [-h] [--foo FOO]
-   argparse.py: error: option --foo is required
+   usage: [-h] --foo FOO
+   : error: the following arguments are required: --foo
 
 As the example shows, if an option is marked as ``required``,
 :meth:`~ArgumentParser.parse_args` will report an error if that option is not
