class String
      def to_quoted_printable(*args)
       [self].pack("M").gsub(/\n/, "\r\n")
      end
      def from_quoted_printable
       self.gsub(/\r\n/, "\n").unpack("M").first
      end
    end


  def quote_text_if_necessary(text)
    # text = text.gsub( /[^a-z ]/i ) { quote_char($&) }.
    #             gsub( / /, "_" )
    # text
    [text].pack("M").gsub(/\n/, "\r\n")
  end

  def quote_if_necessary(text, charset)
    # text = text.gsub( /[^a-z ]/i ) { quote_char($&) }.gsub( / /, "_" )
    text = [text].pack("M").gsub(/\n/, "\r\n").gsub( / /, "_" )
    "=?#{charset}?Q?#{text}?="
  end