[docs] FAQ need list mutation answers (issue 20135)

[ezio.melotti at gmail.com]

LGTM except a couple of minor nits.


http://bugs.python.org/review/20135/diff/12949/Doc/faq/programming.rst
File Doc/faq/programming.rst (right):

http://bugs.python.org/review/20135/diff/12949/Doc/faq/programming.rst#newcode476
Doc/faq/programming.rst:476: object, accessing either one of them
accesses the modified value ``[10]``.
I don't like the term "access" too much, especially since it's repeated
twice.
Maybe the second instance could be replaced with "results in"?

http://bugs.python.org/review/20135/diff/12949/Doc/faq/programming.rst#newcode506
Doc/faq/programming.rst:506: has different behaviors with different
types:  the augmented assignment
There's a double space after the colon (not sure if intentional).

http://bugs.python.org/review/20135/