gh-138584: Fix missing type2test in Lib/tests/list_tests.py #138586
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This PR updates three tests in Lib/test/list_tests.py (CommonTest) to consistently use self.type2test instead of directly constructing a list (or []).
test_getitem_error
test_setitem_error
test_constructor_exception_handling
Previously, these tests only applied to the builtin list, and skipped other list-like classes (such as collections.UserList) that reuse CommonTest.
By switching to self.type2test, the tests now correctly apply to all list-like types under test, ensuring consistency across the test suite.
fixes #138584
📚 Documentation preview 📚: https://cpython-previews--138586.org.readthedocs.build/