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>
    <allredirects garcontinue="Dreamwidth_Scratch_Installation|49" />
  </query-continue>
  <query>
    <pages>
      <page pageid="142" ns="0" title="Bugzilla Searches" />
      <page pageid="500" ns="0" title="CLA" />
      <page pageid="513" ns="0" title="Cap documentation" />
      <page pageid="835" ns="0" title="Codepaths needing testing" />
      <page pageid="1019" ns="0" title="Dev Committing Guidelines" />
      <page pageid="1020" ns="0" title="Dev Database Table Overview" />
      <page pageid="1035" ns="0" title="Dreamhack getting started" />
      <page pageid="1039" ns="0" title="Dreamhack troubleshooting" />
      <page pageid="1414" ns="0" title="Dreamhack" />
      <page pageid="1578" ns="0" title="Main development folder" />
    </pages>
  </query>
</api>