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"?>
    <allimages gaicontinue="22282004_1901392513459108_145300338445414929_n.jpg" />
      <page pageid="77" ns="6" title="File:1.-Graph-Tree.png" />
      <page pageid="50" ns="6" title="File:11934 nombre binaire Code Project.gif" />
      <page pageid="262" ns="6" title="File:1625704-OFAJJJHO-7.jpg" />
      <page pageid="2" ns="6" title="File:17741326 10154356416130965 1186901907 n.jpg" />
      <page pageid="412" ns="6" title="File:1residence.jpg" />
      <page pageid="78" ns="6" title="File:2.-Directed-Graph.png" />
      <page pageid="145" ns="6" title="File:2009 06 09 11 37 04 10 NC70101 06 MD.jpg" />
      <page pageid="327" ns="6" title="File:203197-monsters-poster.jpg" />
      <page pageid="469" ns="6" title="File:220px-Godot logo.svg.png" />
      <page pageid="466" ns="6" title="File:220px-Logo Blender.svg.png" />