func WriteIndentedN(w io.Writer, b []byte, n int) error {
	s := bufio.NewScanner(bytes.NewReader(b))
	if !s.Scan() {
		return nil
	}
	l := s.Text()
	for {
		for x := 0; x < n; x++ {
			if _, err := fmt.Fprint(w, " "); err != nil {
				return err
			}
		}
		if _, err := fmt.Fprint(w, l); err != nil {
			return err
		}
		if !s.Scan() {
			break
		}
		l = s.Text()
		if _, err := fmt.Fprint(w, "\n"); err != nil {
			return err
		}
	}
	return nil
}
func WriteIndentedN(w io.Writer, b []byte, n int) error {
	s := bufio.NewScanner(bytes.NewReader(b))
	if !s.Scan() {
		return nil
	}
	l := s.Text()
	for {
		for x := 0; x < n; x++ {
			if _, err := fmt.Fprint(w, " "); err != nil {
				return err
			}
		}
		if _, err := fmt.Fprint(w, l); err != nil {
			return err
		}
		if !s.Scan() {
			break
		}
		l = s.Text()
		if _, err := fmt.Fprint(w, "\n"); err != nil {
			return err
		}
	}
	return nil
}
// WriteIndentedN indents all lines n spaces.