rem: static void del(void)
add: del(void)
context: static void del(void){	int target_line = WRAP(console.first_line + console.y, console.num_lines);	if(console.x > 0) {		console.x--;		console.lines[target_line][console.x] = ' ';		console.dirty_lines[target_line] = 1;	}}