Issue 4656: Python 3 tutorial has old information about dicts

[From a question sent to the python-help list.]

In the Python 3 tutorial at:

http://docs.python.org/3.0/tutorial/datastructures.html#dictionaries

it says:

The keys() method of a dictionary object returns a list of all the keys 
used in the dictionary, in arbitrary order if you want it sorted, just 
apply the sort() method to the list of keys

But in What's New in Python 3.0 at:

http://docs.python.org/3.0/whatsnew/3.0.html

it says:

dict methods dict.keys(), dict.items() and dict.values() return “views” 
instead of lists. For example, this no longer works: k = d.keys(); 
k.sort(). Use k = sorted(d) instead

I expect that it's just a matter of updating the tutorial.