def print_match(idx)
      return unless VIM::Window.select(@window)
      unlock
      @@buffer[line(idx)] = match_text_for_idx idx
      lock
    end
def print_match(idx)
      return unless VIM::Window.select(@window)
      unlock
      @@buffer[line(idx)] = match_text_for_idx idx
      lock
    end
Print just the specified match.