set.intersection and frozenset.intersection docstrings are back to the wrong two-sets-only version in Python 3.3 (Python 2.7 is not affected):

"""
intersection(...)
    Return the intersection of two sets as a new set.
    
    (i.e. all elements that are in both sets.)
"""

 The correct docstring should be the one already submitted by Alexander Belopolsky:

"""
intersection(...)
    Return the intersection of two or more sets as a new set.
    
    (i.e. all elements that are in all sets.)
"""

 Thanks everyone for your great work and Merry Christmas!