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="108_0874-small.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2928" ns="6" title="File:090410 Diva follow-up x-ray downsampled.jpg" />
      <page pageid="3129" ns="6" title="File:100725 Diva helps move1.jpg" />
      <page pageid="751" ns="6" title="File:104 0449-small.JPG" />
      <page pageid="1168" ns="6" title="File:108 0867-small.jpg" />
      <page pageid="1169" ns="6" title="File:108 0868-small.jpg" />
      <page pageid="1170" ns="6" title="File:108 0869-small.jpg" />
      <page pageid="1171" ns="6" title="File:108 0870-small.jpg" />
      <page pageid="1172" ns="6" title="File:108 0871-small.jpg" />
      <page pageid="1173" ns="6" title="File:108 0872-small.jpg" />
      <page pageid="1174" ns="6" title="File:108 0873-small.jpg" />
    </pages>
  </query>
</api>