If my memory serves me well, 7F was historically used for the «Delete» key code, and outputting it on a real terminal (or in terminal emulator), would result in

If my memory serves me well, 7F was historically used for the «Delete» key code, and outputting it on a real terminal (or in terminal emulator), would result in the in-place text deletion from the output. Not that it has been relevant in last 2-3 decades tho.