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="Cognitive_Robotics_Lecture_Schedule|61" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="David Vernon&#039;s Wiki" />
      <page pageid="40" ns="0" title="Cognitive Robotics" />
      <page pageid="41" ns="0" title="Temporary DREAM Wiki" />
      <page pageid="43" ns="0" title="CSD Cognitive Architecture" />
      <page pageid="60" ns="0" title="Cognitive Robotics Lectures and Labs" />
      <page pageid="63" ns="0" title="Cognitive Robotics Lecture Schedule" />
      <page pageid="67" ns="0" title="CORO Software Development Environment" />
      <page pageid="79" ns="0" title="04-801 Software Development Environment" />
      <page pageid="117" ns="0" title="Cognitive Robotics - Software Installation Guide" />
      <page pageid="118" ns="0" title="Cognitive Robotics - Software Installation Guide 16.04" />
    </pages>
  </query>
</api>