devel/py-argparse-manpage: import py-argparse-manpage-4.3

Avoid documenting your Python script arguments on two places! This
is typically done in an argparse.ArgumentParser help configuration
(help=, description=, etc.), and also in a manually crafted manual
page.

The good thing about an ArgumentParser objects is that it actually
provides a traversable "tree-like" structure, with all the necessary
info needed to automatically generate documentation, for example
in a groff typesetting system (manual pages). And this is where
this project can help.

(wiz)