#16887: IDLE now accepts Cancel in tabify/untabify dialog box.
Clean-up lru_cache examples.  The print() not is needed.  Set maxsize to a power of two.
Update argparse docs to follow order of ArgumentParser() arguments.
Merge heads
Process DEFAULT values in mock side_effect that returns iterator.

Patch by Michael Ford.
#1207589: Backwards-compatibility patch for right-click menu in IDLE.
#17613: Prevent traceback when removing syntax colorizer in IDLE.