append_args (OpenID::Yadis::XRI)

    # File lib/openid/yadis/xrires.rb, line 84
          def self.append_args(url, args)
            return url if args.length == 0

            # rstrip question marks
            rstripped = url.dup
            while rstripped[-1].chr == '?'
              rstripped = rstripped[0...rstripped.length-1]
            end

            if rstripped.index('?')
              sep = '&'
            else
              sep = '?'
            end

            return url + sep + XRI.urlencode(args)
          end