[docs] [issue11425] Cleanup sample codes in tutorial.

[INADA Naoki]

INADA Naoki <songofacandy at gmail.com> added the comment:

This patch inserts spaces around ** operator but I prefer no spaces around **.
Any thoughts?

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue11425>
_______________________________________