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>
    <allpages apcontinue="Cognitive_Robotics_Resources" />
  </query-continue>
  <query>
    <allpages>
      <p pageid="44" ns="0" title="CINDY Cognitive Architecture" />
      <p pageid="67" ns="0" title="CORO Software Development Environment" />
      <p pageid="43" ns="0" title="CSD Cognitive Architecture" />
      <p pageid="40" ns="0" title="Cognitive Robotics" />
      <p pageid="117" ns="0" title="Cognitive Robotics - Software Installation Guide" />
      <p pageid="118" ns="0" title="Cognitive Robotics - Software Installation Guide 16.04" />
      <p pageid="119" ns="0" title="Cognitive Robotics - Software Installation Guide 18.04" />
      <p pageid="61" ns="0" title="Cognitive Robotics Lecture Plan" />
      <p pageid="63" ns="0" title="Cognitive Robotics Lecture Schedule" />
      <p pageid="60" ns="0" title="Cognitive Robotics Lectures and Labs" />
    </allpages>
  </query>
</api>