Bind mouse wheel movements by default, to a lambda that calls the autoloaded #'mwheel-install and then #'mwheel-scrool with the appropriate event.

#!/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