# File lib/omniauth/strategies/cas3.rb, line 176
      def append_params(base, params)
        params = params.each { |k,v| v = Rack::Utils.escape(v) }
        Addressable::URI.parse(base).tap do |base_uri|
          base_uri.query_values = (base_uri.query_values || {}).merge(params)
        end.to_s
      end