gistfile1

        case RUBY_VERSION.split(/\./)[0,2].join.to_i
        when 18
          super(element_name).tap do |new_node|
            atts.each_pair { |k, v| new_node.send :"#{k}=", v }
            block_return = new_node.instance_eval &block if block_given?
            new_node << new_node.encode_special_chars(block_return) if block_return.is_a?(String)
          end
        else
          super(element_name) do |new_node|
            atts.each_pair { |k, v| new_node.send :"#{k}=", v }
            block_return = new_node.instance_eval &block if block_given?
            new_node << new_node.encode_special_chars(block_return) if block_return.is_a?(String)
          end
        end