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"?>
    <allredirects garcontinue="Hacking:LGM_2013_Libre_Graphics_Meeting,_Madrid,_Spain,_2013" />
      <page pageid="175" ns="0" title="Flood algorithm" />
      <page pageid="14" ns="0" title="Hacking:Basic build" />
      <page pageid="40" ns="0" title="Hacking:Dev Meeting 19 Apr 2011" />
      <page pageid="110" ns="0" title="Hacking:GIMPCon 2004, Kristiansand, Norway, 2004" />
      <page pageid="11" ns="0" title="Hacking:GSOC/Archive" />
      <page pageid="20" ns="0" title="Hacking:GSoC" />
      <page pageid="28" ns="0" title="Hacking:GSoC/2011/Ideas" />
      <page pageid="137" ns="0" title="Hacking:GSoC/2015/Ideas" />
      <page pageid="32" ns="0" title="Hacking:GSoC/Future/Ideas" />
      <page pageid="68" ns="0" title="Hacking:LGM 2012 Libre Graphics Meeting, Vienna, Austria, 2012" />