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"?>
    <alltransclusions gatcontinue="Cc-by-sa-3.0|1384" />
      <page pageid="635" ns="0" title="FOCS Scripting Details" />
      <page pageid="1375" ns="6" title="File:Solar hull small.png" />
      <page pageid="1376" ns="6" title="File:Agregate asteroid hull small.png" />
      <page pageid="1377" ns="6" title="File:Asteroid hull small.png" />
      <page pageid="1378" ns="6" title="File:Basic-medium-hull small.png" />
      <page pageid="1379" ns="6" title="File:Basic-small-hull small.png" />
      <page pageid="1380" ns="6" title="File:Bio adaptive hull small.png" />
      <page pageid="1381" ns="6" title="File:Camouflage asteroid hull small.png" />
      <page pageid="1382" ns="6" title="File:Colony base hull small.png" />
      <page pageid="1383" ns="6" title="File:Compressed energy hull small.png" />