You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allredirects garcontinue="填表公式:工具栏按钮单击事件|759" />
  </query-continue>
  <query>
    <pages>
      <page pageid="760" ns="0" title="值变化" />
      <page pageid="761" ns="0" title="单元格按钮单击" />
      <page pageid="763" ns="0" title="填表公式函数" />
      <page pageid="1102" ns="0" title="数据源-列表选择" />
      <page pageid="1105" ns="0" title="平台/产品安装说明" />
      <page pageid="1112" ns="0" title="云表服务器控制中心使用说明" />
      <page pageid="1113" ns="0" title="云表服务器各版本说明" />
      <page pageid="1554" ns="0" title="移动端:APP手机扫描二维码条码" />
      <page pageid="1555" ns="0" title="填表公式:设备监听事件" />
      <page pageid="3071" ns="0" title="移动端:APP地图定位" />
    </pages>
  </query>
</api>