# File lib/rubytorrent/message.rb, line 118
  def to_s
    case @id
    when :bitfield
      %{bitfield <#{@args[:bitfield].extend(StringExpandBits).expand_bits}>}
    else
      %{#@id#{@args.nil? ? "" : "(" + @args.map { |k, v| "#{k}=#{v.to_s.inspect}" }.join(", ") + ")"}}
    end
  end