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>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20130818060348" timestamp="2013-08-18T06:03:48Z" ns="0" title="Color" />
        <page value="20130818060402" timestamp="2013-08-18T06:04:02Z" ns="0" title="ColorTransform" />
        <page value="20130818060414" timestamp="2013-08-18T06:04:14Z" ns="0" title="Matrix" />
        <page value="20130826064115" timestamp="2013-08-26T06:41:15Z" ns="0" title="LWFフォーマットについて" />
        <page value="20130828064752" timestamp="2013-08-28T06:47:52Z" ns="0" title="上級編" />
        <page value="20130901072130" timestamp="2013-09-01T07:21:30Z" ns="0" title="LWFS 20130830-1542" />
        <page value="20130902121300" timestamp="2013-09-02T12:13:00Z" ns="0" title="BitmapClip" />
        <page value="20130917010514" timestamp="2013-09-17T01:05:14Z" ns="0" title="APIリファレンス" />
        <page value="20130917010551" timestamp="2013-09-17T01:05:51Z" ns="0" title="Tween" />
        <page value="20130929202150" timestamp="2013-09-29T20:21:50Z" ns="0" title="エンジニア向け情報" />
      </results>
    </querypage>
  </query>
</api>