Attaching new patch with small changes:

* Don't describe a class with "Returns ..." as if it was a function.
* Indent interposed paragraphs so that the method descriptions still
belong to the .. class directive.
* Fixed Ned's typo.
* Note that elements() and most_common() order elements arbitrarily.
* Reorder the seealso's a bit; the first line is bold.

Questions:

* Steven's counter.update('abcdee') wouldn't work -- I guess one is
supposed to use counter.update(Counter('abcdee')). Should that be noted
in the docs?
* Is it needed to sort the items for the __repr__?