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="B-52_bomber|3200" />
  </query-continue>
  <query>
    <pages>
      <page pageid="237" ns="0" title="B52 bomber" />
      <page pageid="260" ns="0" title="R-pentomino" />
      <page pageid="599" ns="4" title="LifeWiki:Style guide" />
      <page pageid="737" ns="0" title="Gun" />
      <page pageid="2514" ns="0" title="Noam Elkies" />
      <page pageid="2633" ns="0" title="Bomber (disambiguation)" />
      <page pageid="2837" ns="10" title="Template:Disambiglink" />
      <page pageid="11846" ns="2" title="User:Apple Bottom/TODO/Life Lexicon" />
      <page pageid="13015" ns="2" title="User:Entity Valkyrie/Period-165 MWSS gun 2" />
      <page pageid="13269" ns="0" title="BLx19R" />
    </pages>
  </query>
</api>