Factor out lists of operators specially treated by 'make-autoload'. General idea approved by Mike Sperber, and tested in 21.4 by building JDE.

#!/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