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="Awic_product.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="18580" ns="6" title="File:0601p-job small.jpg" />
      <page pageid="18582" ns="6" title="File:0601p-joseph small.jpg" />
      <page pageid="70063" ns="6" title="File:1.png" />
      <page pageid="17798" ns="6" title="File:Abortion dev fetus-ashz-090310.jpg" />
      <page pageid="17797" ns="6" title="File:Abortion fetus-apva-090313.jpg" />
      <page pageid="17799" ns="6" title="File:Abortion when occur-astz-090310.gif" />
      <page pageid="17289" ns="6" title="File:Alan.png" />
      <page pageid="21284" ns="6" title="File:Article Knocking.jpg" />
      <page pageid="21289" ns="6" title="File:Article courage.jpg" />
      <page pageid="21287" ns="6" title="File:Article forgiven.jpg" />
    </pages>
  </query>
</api>