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>
    <alltransclusions gatcontinue="CanonCamerasFlexTT6|982" />
  </query-continue>
  <query>
    <pages>
      <page pageid="61" ns="0" title="HyperSync" />
      <page pageid="62" ns="0" title="Understanding HyperSync and High Speed Sync" />
      <page pageid="71" ns="0" title="Basic Wireless TTL" />
      <page pageid="72" ns="0" title="Advanced Wireless TTL" />
      <page pageid="74" ns="0" title="Canon Compatibility" />
      <page pageid="467" ns="0" title="Nikon D40x" />
      <page pageid="468" ns="0" title="Nikon D40" />
      <page pageid="471" ns="0" title="Nikon D5000" />
      <page pageid="494" ns="0" title="HyperSync Setup" />
      <page pageid="717" ns="0" title="Clipping and Gradient" />
    </pages>
  </query>
</api>