bpo-28961: Address my comments from earlier code review (#306)

(cherry picked from commit dea1536fd3a8424d537794cd53715df0989cbbe1)

Lib/unittest/test/testmock/testhelpers.py

@@ -307,18 +307,9 @@ class CallTest(unittest.TestCase):
         self.assertEqual(args, other_args)
 
     def test_call_with_name(self):
-        self.assertEqual(
-            'foo',
-            _Call((), 'foo')[0],
-        )
-        self.assertEqual(
-            '',
-            _Call((('bar', 'barz'), ), )[0]
-        )
-        self.assertEqual(
-            '',
-            _Call((('bar', 'barz'), {'hello': 'world'}), )[0]
-        )
+        self.assertEqual(_Call((), 'foo')[0], 'foo')
+        self.assertEqual(_Call((('bar', 'barz'),),)[0], '')
+        self.assertEqual(_Call((('bar', 'barz'), {'hello': 'world'}),)[0], '')
 
 
 class SpecSignatureTest(unittest.TestCase):