: argtype lists all em mnemonics that have an argument type equal to
: one of the letters specified in the argument
case x$# in
	x2)	
		;;
	x*)	echo "Usage: $0 argtypes <em_table>" 1>&2
		exit 1
		;;
esac
ed - $2 << A
1,/^\$/d
1,/^\$/d
1,/^\$/g/^\(...\)	[$1].*/s//\\1/gp
A
