[docs] Typo in collections.Counter class example

Hello, It seems that I found micro bug in Python documentation describing collections.Counter class<http://docs.python.org/3.3/library/collections.html#counter-objects> . There is the following snippet of code c.most_common()[:-n:-1] # n least common elements Actually this expression returns not *n* least common elements, but rather *n - 1,* beacuse second boundary is not included (as usual with slices). You probably meant c.most_common()[-n:] or c.most_common()[:-n-1:-1] if reverse ordering is nesessary. -- Best regards Mikhail Golubev