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"?>
    <allpages apcontinue="Rip_Video_DVD_that_is_not_Finalized" />
      <p pageid="7" ns="0" title="Creating a SVN Repository" />
      <p pageid="35" ns="0" title="ElasticSearch Query DSL" />
      <p pageid="36" ns="0" title="ElasticSearch Search" />
      <p pageid="4" ns="0" title="Emacs and slime reference" />
      <p pageid="18" ns="0" title="Install Apache and PHP to do Secure h264 Pseudo Streaming" />
      <p pageid="1" ns="0" title="Main Page" />
      <p pageid="6" ns="0" title="Moving a SVN Repository" />
      <p pageid="12" ns="0" title="Programming" />
      <p pageid="2" ns="0" title="Programming Tutorials" />
      <p pageid="41" ns="0" title="RedBeanPHP Cheat Sheet" />