Issue #25488: Stpp idle.py from adding a entry when it is a duplicate.
Also, make idlelib.idle.main() work after import idlelib.idle.
T
Terry Jan Reedy committed
1813aa1a0c456d36efce87cfacf47eb89b6958e6
Parent: 55f3ae6
Also, make idlelib.idle.main() work after import idlelib.idle.