defer out.Flush()
	var on = false
	s := bufio.NewScanner(in)
	first := true
	for s.Scan() {
		line := s.Text()
		if !on {
			// First relevant line contains "= obj.ABase".
			// If we find it, delete the = so we don't stop immediately.
			const prefix = "= obj.ABase"
			index := strings.Index(line, prefix)
			if index < 0 {
				continue
			}
			// It's on. Start with the header.