[docs] [issue18663] In unittest.TestCase.assertAlmostEqual doc specify the delta description

[Roundup Robot]

Roundup Robot added the comment:

New changeset e0f86c3b3685 by Ezio Melotti in branch '3.3':
#18663: document that assertAlmostEqual also works when the values are equal and add tests.
http://hg.python.org/cpython/rev/e0f86c3b3685

New changeset eeda59e08c83 by Ezio Melotti in branch 'default':
#18663: merge with 3.3.
http://hg.python.org/cpython/rev/eeda59e08c83

New changeset 9ddc63c039ba by Ezio Melotti in branch '2.7':
#18663: document that assertAlmostEqual also works when the values are equal and add tests.
http://hg.python.org/cpython/rev/9ddc63c039ba

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nosy: +python-dev

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