# File lib/action_mailer/vendor/tmail-1.2.3/tmail/quoting.rb, line 85
      def unquote_quoted_printable_and_convert_to(text, to, from, preserve_underscores=false)
        text = text.gsub(/_/, " ") unless preserve_underscores
        text = text.gsub(/\r\n|\r/, "\n") # normalize newlines
        convert_to(text.unpack("M*").first, to, from)
      end