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>
    <alllinks galcontinue="Boss_Borgrasper" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1619" ns="0" title="BC-303 Prometheus" />
      <page pageid="1620" ns="0" title="BC-304 Daedalus" />
      <page pageid="1630" ns="0" title="BUTMOCV-MkXXXIV" />
      <page pageid="1411" ns="0" title="Background" />
      <page pageid="1576" ns="0" title="Battle Matey" />
      <page pageid="1631" ns="0" title="Battle Ship" />
      <page pageid="1593" ns="0" title="Berserk Trooper" />
      <page pageid="1594" ns="0" title="Black Medius" />
      <page pageid="1578" ns="0" title="Blaster Matey" />
      <page pageid="1553" ns="0" title="Bomber Barrelion" />
    </pages>
  </query>
</api>