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="Installation_of_older_Knoppix_to_HDD" />
  </query-continue>
  <query>
    <pages>
      <page pageid="747" ns="0" title="Basic Poor Mans" />
      <page pageid="742" ns="0" title="Cheat Codes" />
      <page pageid="744" ns="0" title="Cheat Codes Deutsch" />
      <page pageid="776" ns="0" title="Customizing FAQ" />
      <page pageid="738" ns="0" title="Downloading FAQ" />
      <page pageid="2127" ns="0" title="Full HD install - Warnung" />
      <page pageid="2126" ns="0" title="Full HD install - warning" />
      <page pageid="2124" ns="0" title="HD Installation Warnung" />
      <page pageid="2125" ns="0" title="HD based HowTo" />
      <page pageid="1624" ns="0" title="How to Theme KDE" />
    </pages>
  </query>
</api>