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="Early_Energy_Tanks" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Berserker Lord (second battle)" missing="" />
      <page pageid="24" ns="0" title="BSJ" />
      <page pageid="29" ns="0" title="Berserker Lord (first battle)" />
      <page pageid="36" ns="0" title="Bomb Jumps" />
      <page pageid="11" ns="0" title="Boss Tricks" />
      <page pageid="30" ns="0" title="Chozo Observatory SW" />
      <page pageid="41" ns="0" title="Creche Transit SW" />
      <page pageid="25" ns="0" title="Dark Samus" />
      <page pageid="54" ns="0" title="Dashes" />
      <page pageid="32" ns="0" title="Defense Drone" />
    </pages>
  </query>
</api>