#58092 (BPO 13884) removed tear-off menu in IDLE, but it's still there in the turtledemo window.

tearoff=0 will disable tear-off vertical menu (it's even Windows 8's close window x style😨)

Last, I adjusted the scroll bar for previewing py files to the right. The original left side didn't fit the usage👀

There is no mention of tearoff in the Python docs, it seem like an outdated feature (but it is enabled by default)🤔

Screenshout