[docs] [issue16863] Python 2 error in Argparse tutorial

[Tshepang Lekhonkhobe]

Tshepang Lekhonkhobe added the comment:

> A quick patch would be 'This tutorial was written for argparse in Python 3. A few details are different in 2.x.' But feel free to do better.

That really sounds great, especially since it avoids resorting to
things as ugly as "...and this is Python 2 output".

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16863>
_______________________________________