! $eterna: backspace,v 1.7 2018/06/10 08:17:38 mrg Exp $ ! ! Copyright (c) 1990-2018 Michael Sandrof, Troy Rollo, Matthew Green, ! and other ircII contributors. ! ! All rights reserved. See the HELP IRCII COPYRIGHT file for more ! information. ! Usage: BIND BACKSPACE The BACKSPACE function deletes the character to the left of the cursor and moves the cursor one space to the left. If the cursor is at the first position in the input line, BACKSPACE has no effect.