# deactivate chatty blocks. These blocks make tex/mf less chatty.
case $# in
1) tm=$1 ;;
*) tm=tex ;;
esac
ed $tm.ch <<'END'
g/^@x chatty/.,/^@z/s/^/	/\
?^	@x?,.p
w
q
END
test $? = 0 || (echo $0 $1 failed ; exit 1)