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="20100915183957" timestamp="2010-09-15T18:39:57Z" ns="0" title="Tool carousel" />
        <page value="20100924183320" timestamp="2010-09-24T18:33:20Z" ns="0" title="Cables" />
        <page value="20100929155125" timestamp="2010-09-29T15:51:25Z" ns="0" title="Parallel IO window" />
        <page value="20100929155333" timestamp="2010-09-29T15:53:33Z" ns="0" title="Serial IO window" />
        <page value="20101001150404" timestamp="2010-10-01T15:04:04Z" ns="0" title="Todo" />
        <page value="20101001165120" timestamp="2010-10-01T16:51:20Z" ns="0" title="Blank monitor" />
        <page value="20101001180730" timestamp="2010-10-01T18:07:30Z" ns="0" title="Interface board" />
        <page value="20101001213658" timestamp="2010-10-01T21:36:58Z" ns="0" title="G-code G4" />
        <page value="20101001213732" timestamp="2010-10-01T21:37:32Z" ns="0" title="G-code F" />
        <page value="20101001214912" timestamp="2010-10-01T21:49:12Z" ns="0" title="G-code G0" />
      </results>
    </querypage>
  </query>
</api>