Puzzled by list-appending behavior

[Chris Rebert]

On Thu, May 26, 2011 at 12:23 AM, Chris Angelico <rosuav at gmail.com> wrote:
> On Thu, May 26, 2011 at 5:20 PM, Chris Angelico <rosuav at gmail.com> wrote:
>>
>> Ben Finney has already answered the main question
>
> Giving credit where credit's due, it was more Chris Rebert's post that
> answered the question. Sorry Chris!

Eh, one can't fight chronology!

I'm just surprised that the docstring doesn't explicitly state
"Returns None." by this point, given that this is such a common point
of newbie confusion.

Cheers,
Chris