Update Doc/library/argparse.rst

Author: AA-Turner

Doc/library/argparse.rst

@@ -443,7 +443,7 @@ is considered equivalent to the expression ``['-f', 'foo', '-f', 'bar']``.
 .. note::
 
    Empty lines are treated as empty strings (``''``), which are allowed as values but
-   not as arguments. Empty lines, that are read as arguments will result in an
+   not as arguments. Empty lines that are read as arguments will result in an
    "unrecognized arguments" error.
 
 :class:`ArgumentParser` uses :term:`filesystem encoding and error handler`