A slightly revised patch committed in revision 88554:

1. Fixed Éric's whitespace comment
2. Fixed a test in test_descrtut.py which was listing list's methods
3. Moved the change to collections.py onto Lib/collections/__init__.py
4. Added NEWS entry

Éric - as I mentioned earlier in this issue, I chose to leave the syntax of the docstring for the new methods similar to the same methods in dict (dict docstring look better and more internally consistent anyhow). I propose to move further discussion of this matter into a separate issue which will deal with the overall (in)consistency in the docstrings of list and dict.