message: Fixing error output in api_compatibility_test.py. Looks like it should be self.maxDiff instead of self.maxDiffs:
  "Diff is 2708 characters long. Set self.maxDiff to None to see it."
diff: @@ -174,7 +174,7 @@ class ApiCompatibilityTest(test.TestCase):
  verbose_diff_message = diff_message
  else:
  # Do not truncate diff
  - self.maxDiffs = None # pylint: disable=invalid-name
  + self.maxDiff = None # pylint: disable=invalid-name
  # Now we can run an actual proto diff.
  try:
  self.assertProtoEquals(expected_dict[key], actual_dict[key])
  