unittest.mock.MagicMock now supports the __round__() magic method.

The new method allows the developer to control when to stop the
feature of mocks that automagically creates new mocks when accessing
an attribute that was not declared before
Signed-off-by: Mario Corchero <mariocj89@gmail.com>

There was an unneeded space before a closing parenthesis in the `unittest.mock` documentation.

identity when they are copied or pickled.

Since 01ae1ac2daf4, it doesn't accept any arguments.

Patch by Michael Killough.

Reformat header above separator line (added if missing) to a common format.
Patch by Yoni Lavi.

We now have two keyword only parameters in the reset_mock function to
selectively reset the return_value or the side_effects, or both.

The default value of __len__ is 0, not 1:

    >>> from unittest.mock import MagicMock
    >>> mock = MagicMock()
    >>> len(mock)
    0

Reported by Alex on docs@p.o.

Remove the remaining VMSError reference. VMS support is gone.

Issue #26323: Add assert_called() and assert_called_once() methods to
unittest.mock.Mock.

This changes the main documentation, doc strings, source code comments, and a
couple error messages in the test suite. In some cases the word was removed
or edited some other way to fix the grammar.

The changes to Doc/library/unittest.mock.rst are almost entirely a
selective backport of the 3.5 page.

Fixed 2 to 3 porting bug in pynche.ColorDB.

Patch by Karan Goel.

Patch by A.M. Kuchling.

It raises AssertionError if the mock has been called.

It raises `AttributeError` incase of an attribute startswith assert
or assret.