Delete trailing spaces in Acme

trail

#!/usr/bin/env bash

# Removes trailing spaces from entire window.
# Run as `trail` (no | or < necessary)
# Inspired by:
# http://www.mostlymaths.net/2013/03/extensibility-programming-acme-text-editor.html

echo -n "0,$" | 9p write acme/$winid/addr
9p read acme/$winid/body | sed 's/ *$//g' | 9p write acme/$winid/data
echo -n "0,0" | 9p write acme/$winid/addr
echo -n "dot=addr" | 9p write acme/$winid/ctl
echo -n "show" | 9p write acme/$winid/ctl