scripts/text/oldcomments.sed

$! {
	N
	N
	s/\/\/-+\|\n//
	t m1
	b mE
:m1
	s/  / MARKER/
	h
	s/.+MARKER//
	s/ /-/g
	x
	s/MARKER.+//
	x
	H
	x
	s/ \n-/ --/
	t m2
	b mE
:m2
	N
	N
	s/\/\/\n//g
:mE
}