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="Installing" />
  </query-continue>
  <query>
    <pages>
      <page pageid="34" ns="0" title="Circumferential and Radial measurements" />
      <page pageid="1" ns="0" title="CometWiki" />
      <page pageid="4" ns="0" title="Cometparams.ini parameter file" />
      <page pageid="45" ns="0" title="Description of the Model" />
      <page pageid="17" ns="0" title="Detailed Program Flow" />
      <page pageid="30" ns="0" title="Display settings" />
      <page pageid="35" ns="0" title="Ellipsoid and Capsule symmetry breaking" />
      <page pageid="8" ns="0" title="Examples" />
      <page pageid="33" ns="0" title="Forces during Symmetry Breaking" />
      <page pageid="43" ns="0" title="Implementation in C++" />
    </pages>
  </query>
</api>