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>
    <allimages gaicontinue="Context_icon_alert.png" />
  </query-continue>
  <query>
    <pages>
      <page pageid="319" ns="6" title="File:Associate.png" />
      <page pageid="43" ns="6" title="File:Bunny carrying items1.jpg" />
      <page pageid="44" ns="6" title="File:C sign.jpg" />
      <page pageid="134" ns="6" title="File:Communitymap BraveBunny Tiled.png" />
      <page pageid="318" ns="6" title="File:Communitymap RocksPlayground Tiled.png" />
      <page pageid="293" ns="6" title="File:Communitymap ZoneSix Tiled.png" />
      <page pageid="145" ns="6" title="File:Communitymap madeIn30Minutes Tiled.png" />
      <page pageid="292" ns="6" title="File:Communitymap palace Tiled.png" />
      <page pageid="138" ns="6" title="File:Communitymap zoneFive Tiled.png" />
      <page pageid="116" ns="6" title="File:Concept art bunny01.jpg" />
    </pages>
  </query>
</api>