path: assert path.join() arguments equally
Re-use assertPath() when asserting path argument types in join() as throughout the rest of the path module.
This also ensures the same error message generated for posix as for win32.
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Do not update/delete: Notification broadcast message test data
Re-use assertPath() when asserting path argument types in join() as throughout the rest of the path module.
This also ensures the same error message generated for posix as for win32.