[docs] Improve unittest basic example in the doc (issue 11468)

[zachary.ware at gmail.com]

http://bugs.python.org/review/11468/diff/2986/Doc/library/unittest.rst
File Doc/library/unittest.rst (right):

http://bugs.python.org/review/11468/diff/2986/Doc/library/unittest.rst#newcode131
Doc/library/unittest.rst:131: self.assertEqual(s.split(), ['hello',
'world'])
On 2014/05/27 14:57:56, berkerpeksag wrote:
> I think this is a good example to use assertListEqual.

There should be no need to use assertListEqual explicitly, assertEqual
uses the type-specific equality functions under the hood:

 >>> unittest.TestCase().assertEqual('hello world'.split(), ['goodbye',
'world'])

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "P:\Python34\lib\unittest\case.py", line 797, in assertEqual
    assertion_func(first, second, msg=msg)
  File "P:\Python34\lib\unittest\case.py", line 995, in assertListEqual
    self.assertSequenceEqual(list1, list2, msg, seq_type=list)
  File "P:\Python34\lib\unittest\case.py", line 977, in
assertSequenceEqual
    self.fail(msg)
  File "P:\Python34\lib\unittest\case.py", line 642, in fail
    raise self.failureException(msg)
AssertionError: Lists differ: ['hello', 'world'] != ['goodbye', 'world']

First differing element 0:
hello
goodbye

- ['hello', 'world']
+ ['goodbye', 'world']

http://bugs.python.org/review/11468/