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The Tutorial section More on Lists
https://docs.python.org/3.4/tutorial/datastructures.html#more-on-lists includes list.pop but ignores it in the example and final comment. I think the examples should be augmented and the comment modified.
1. (simplest) End the example block with
>>> a.pop()
1234.5
>>> a
[-1, 1, 66.25, 333, 333]
2. The comment says "You might have noticed that methods like insert, remove or sort that modify the list have no return value printed – they return None. [1] This is a design principle for all mutable data structures in Python." [The footnote says "[1] Other languages may return the mutated object, which allows method chaining, such as d->insert("a")->remove("b")->sort();."]
Inserting 'only' before 'modify' makes the statement true even now with .pop added. I think 'the default' should be added before 'None', but that would be optional. I do not think .pop needs to be explicitly mentioned here since the point of the comment is to explain the lack of a printed return value, and .pop does have a printed return value.

I've added the example and modified the final comment.

That looks good and is ready to apply.

New changeset 6fc09f30b514 by Terry Jan Reedy in branch '2.7':
Issue #21545: Add .pop example and tweak comment about pure mutation methods.
http://hg.python.org/cpython/rev/6fc09f30b514
New changeset 3f2b6034b73a by Terry Jan Reedy in branch '3.4':
Issue #21545: Add .pop example and tweak comment about pure mutation methods.
http://hg.python.org/cpython/rev/3f2b6034b73a 

Thanks David. If this is not to be your last contribution, and we hope not, please fill out the contributor agreement, if you have hot already, at
https://www.python.org/psf/contrib/contrib-form/ 

Thanks for the info, I've signed the agreement.