FRANK.MCCONNEL on Nostr: Now imagine a terminal driver that echoes BS when you press back space, but then ...

Now imagine a terminal driver that echoes BS when you press back space, but then follows it with SP if it finds you are at the first character of the read request. With a sufficiently fancy HP terminal, you cursor up to a previous command that you want to do again (the cursor movements are done locally), then press back space which sends BS SP and erases the command prompt, then press the terminal's ENTER key (different from RETURN) which retransmits the previous line.