state.appendAttr(String(key, msg))
	}
	state.groups = stateGroups // Restore groups passed to ReplaceAttrs.
	state.appendNonBuiltIns(r)
	state.buf.WriteByte('\n')

	h.mu.Lock()
	defer h.mu.Unlock()
	_, err := h.w.Write(*state.buf)
	return err
}

func (s *handleState) appendNonBuiltIns(r Record) {
	// preformatted Attrs
	if pfa := s.h.preformattedAttrs; len(pfa) > 0 {
		s.buf.WriteString(s.sep)