# File lib/mail/utilities.rb, line 55
      def dquote( str )
        str = $1 if str =~ /^"(.*)?"$/
        # First remove all escaped double quotes:
        str = str.gsub(/\\"/, '"')
        # Then wrap and re-escape all double quotes
        '"' + str.gsub(/["]/n) {|s| '\\' + s } + '"'
      end