Create a new error for when a char is needed but event-to-character gives nil lisp/ChangeLog addition: 2015-03-14 Aidan Kehoe <kehoea@parhasard.net> * cmdloop.el (no-character-typed): New error, for those cases when a keystroke is to be treated as a character but has no character equivalent. * cmdloop.el (read-char-1): Use it. * keymap.el (synthesize-keysym): Use it. src/ChangeLog addition: 2015-03-14 Aidan Kehoe <kehoea@parhasard.net> * general-slots.h (Qno_character_typed): New error symbol. * event-stream.c (syms_of_event_stream): Define it. New error, for those cases when a keystroke is to be treated as a character in some context but has no character equivalent. * cmds.c (Fself_insert_command): Use it.

#!/bin/sh
if
test -r $2
then
if
cmp $1 $2 > /dev/null
then
echo $2 is unchanged
rm -f $1
else
mv -f $1 $2
fi
else
mv -f $1 $2
fi