[docs] [issue24269] Few improvements to the collections documentation

[Raymond Hettinger]

Raymond Hettinger added the comment:

Thanks for the patch.  I've applied all of it except for the expansion of code in the multiset example where I've keep the style of the itertools recipes.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue24269>
_______________________________________