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"?>
    <alllinks galcontinue="Hacking::Modules|5" />
      <page pageid="1" ns="0" title="Main Page" />
      <page pageid="4" ns="0" title="Hacking:Netbeans" />
      <page pageid="29" ns="0" title="Hacking:Dev Meeting 14 Mar 2011" />
      <page pageid="80" ns="0" title="Documentation:Main" />
      <page pageid="97" ns="0" title="Hacking:Developer FAQ" />
      <page pageid="174" ns="0" title="Index of Algorithms" />
      <page pageid="180" ns="0" title="Algorithms:Flood" />