poplib.POP3.list() returns extra value?

[Steve Greenland]

For the poplib.POP3 object, docs say:

list([which])
    Request message list, result is in the form (response, ['mesg_num octets',
    ...]). If which is set, it is the message to list. 


But (I've folded the long line):

Python 2.3.5 (#2, May  4 2005, 08:51:39) 
[GCC 3.3.5 (Debian 1:3.3.5-12)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import poplib
>>> p = poplib.POP3("annie")
>>> p.user("poptest")
'+OK'
>>> p.pass_("poptest")
'+OK'
>>> p.list()
('+OK', ['1 2680', '2 2720', '3 9996', '4 23368', '5 2267', '6 2661', '7
4925', '8 2548', '9 10114', '10 1850', '11 14239', '12 6678', '13 6592',
'14 10011', '15 3554', '16 5764', '17 5080', '18 9998', '19 2056', '20
6354', '21 3031', '22 2868', '23 6325', '24 2566', '25 4827', '26 2995',
'27 2963', '28 2548', '29 9138', '30 2408', '31 2245', '32 2547', '33
2439', '34 9816', '35 2584', '36 10259', '37 1997', '38 4930', '39
1859', '40 9105', '41 6649', '42 6776', '43 2338', '44 17808', '45
4960', '46 1785', '47 2123', '48 2011', '49 9124', '50 1910', '51 1307',
'52 18869', '53 2507', '54 19099', '55 2328', '56 2069', '57 1654', '58
2346', '59 2891', '60 1865', '61 9334'], 548)
>>> 

Note the trailing ", 548". By symmetry with the POP3.retr() function,
I'll guess that it's the number of octets in the response; it gets
bigger with more messages. I've tried this against three different
servers (popa3d, some version of Exchange, whatever's on RedHat 7.2),
and two versions of python (2.3.5 on Debian sarge, 2.2 on AIX 5.1) and
it's the same on all of them.

It could be that I'm insane, but I'd prefer to believe this is a doc
error that no one ever noticed because everybody uses POP3.list()[1].
You be the judge!

Steve

-- 
Steve Greenland
    The irony is that Bill Gates claims to be making a stable operating
    system and Linus Torvalds claims to be trying to take over the
    world.       -- seen on the net