# activate ini block to make prod 
case $# in
1) tm=$1 ;;
*) tm=tex ;;
esac
ed $tm.ch <<'END'
g/^	@x ini/.,/^	@z/s/^	//\
?^@x?,.p
w
q
END
test $? = 0 || (echo $0 failed; exit 1)