patchbomb: don't test ambiguous address This is a bug in Python's `email` package and shouldn't be relied on. Python 3.12 has fixed this problem¹ and raises an exception. We keep the multiple `-t` because this is still relevant for testing. [1] https://github.com/python/cpython/issues/102988 [2] https://docs.python.org/3/whatsnew/changelog.html