[issue30308] Add code coverage for argument in random.shuffle

[Cheryl Sabella]

Cheryl Sabella added the comment:

I've also changed the test to use Mock for the random function.  I'm new to mock, so I'm not sure if I did it right.  Using a return_value seemed to be the best way to go.  I didn't know if it was necessary to test if an incorrect function was sent in.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30308>
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