[docs] map objects are not lists

[Mike Hoy]

>
> In other words, the map function returns a map object, not a list object,
Python 2.7.3 (default, Aug  1 2012, 05:14:39)
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> MAP = map(lambda x: x**2, range(10))
 >>> type(MAP)
<type 'list'>
 >>>

It seems to me that it does return a list object. Am I understanding 
this correctly? If not, please clarify.

Thanks,

Mike Hoy