bpo-34275: Make IDLE calltips always visible on Mac. (GH-8639)

Some MacOS-tk combinations need .update_idletasks().
The call is both unneeded and innocuous on Linux and Windows.
Patch by Kevin Waltzer.

Terry Jan Reedy committed 7y ago

9beaef6225cdae972b1cccd5310828cc29bf9d33

Parent: bcd1d97

Committed by GitHub <noreply@github.com> on 8/3/2018, 2:50:01 AM