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>
    <alllinks galcontinue="Fixed_Playlist,_Dynamic_Content" />
  </query-continue>
  <query>
    <pages>
      <page pageid="41" ns="0" title="Best Practice" />
      <page pageid="79" ns="0" title="Cache Control" />
      <page pageid="40" ns="0" title="Checking for Updates" />
      <page pageid="54" ns="0" title="Compliance levels" />
      <page pageid="53" ns="0" title="Conditional play" />
      <page pageid="73" ns="0" title="Currency Table" />
      <page pageid="64" ns="0" title="Device configuration" />
      <page pageid="7" ns="0" title="Exclusive playlist (excl)" />
      <page pageid="67" ns="0" title="Firmware update" />
      <page pageid="42" ns="0" title="Fit options" />
    </pages>
  </query>
</api>