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="17_Court_St_N.gif" />
  </query-continue>
  <query>
    <pages>
      <page pageid="3115" ns="6" title="File:09-05-02 disgraceland.jpg" />
      <page pageid="3114" ns="6" title="File:090119-disgraceland.jpg" />
      <page pageid="3113" ns="6" title="File:090420 disgraceland.jpg" />
      <page pageid="2763" ns="6" title="File:1004A.jpg" />
      <page pageid="2764" ns="6" title="File:1004B.jpg" />
      <page pageid="3142" ns="6" title="File:1019 Gore St W.gif" />
      <page pageid="3316" ns="6" title="File:12345.JPG" />
      <page pageid="3143" ns="6" title="File:1408 Brown St.gif" />
      <page pageid="3602" ns="6" title="File:162833 10150366988795397 511905396 16399228 5785840 n.jpg" />
      <page pageid="3138" ns="6" title="File:16 Cumberland St S.gif" />
    </pages>
  </query>
</api>