They should make `msg` a keyword-only argument on all the TestCase.assert* statements. It wouldn't be the first breaking change of this type. Searching for ann

They should make `msg` a keyword-only argument on all the TestCase.assert* statements. It wouldn't be the first breaking change of this type. Searching for announced breaking changes about arguments to Python included functions... https://bugs.python.org/issue25628 https://bugs.python.org/issue25628 https://bugs.python.org/issue29193 https://bugs.python.org/issue29193 https://bugs.python.org/issue36492 https://bugs.python.org/issue36492 https://bugs.python.org/issue29209 https://bugs.python.org/issue29209