call site 8 for code.ExceptionInfo.exconly
magic/testing/test_invoke.py - line 12
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   def test_invoke_assertion():
       py.magic.invoke(assertion=True)
       try:
->         check_assertion()
       finally:
           py.magic.revoke(assertion=True)
magic/testing/test_invoke.py - line 7
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   def check_assertion():
       excinfo = py.test.raises(AssertionError, "assert 1 == 2")
->     assert excinfo.exconly(tryshort=True) == "assert 1 == 2"