CallTips.py has a 'main' test at the end. Currently, test TC fails in 3.x but not 2.7. So either the test became invalid or get_argspec was not completely and correctly converted from get_arg_text. This should be fixed.

int.append( does not bring up a tip on either version, but should if possible.

The failing examples in previous messages should be added to the tests to ensure that all pass now and continue to pass in the future. So I am not closing this yet, and a new patch is needed.