[docs] Documentation bug on http://docs.python.org/library/atexit.html

[Daniel Moisset]

Hi. I'm looking at the documentation for the "atexit" module and it
has an inconsistency

The first paragraph says "The order in which the functions are called
is not defined". However, the second pargaraph at
http://docs.python.org/library/atexit.html#atexit.register says "At
normal program termination (for instance, if sys.exit() is called or
the main module’s execution completes), all functions registered are
called in last in, first out order." which contradicts the first
paragraph stating that order is not defined.

I'd suggest a fix if I knew which one was right :)

Regards,
    D.