[issue13386] Document documentation conventions for optional args

[Eric Snow]

Eric Snow <ericsnowcurrently at gmail.com> added the comment:

> Me too.  (Can you give the #ids of these other issues?)

#13012 is the one that I was thinking of (msg144328 specifically).  However, I'm sure there was one more recently (which I can't find now).

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue13386>
_______________________________________