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="Baron&#039;s_Coda" />
  </query-continue>
  <query>
    <pages>
      <page pageid="9" ns="0" title="Back" />
      <page pageid="459" ns="0" title="Band of Screaming Winds" />
      <page pageid="751" ns="0" title="Bane Ash" />
      <page pageid="2851" ns="0" title="Barbarian" />
      <page pageid="529" ns="0" title="Barbarian Spiritist&#039;s Hammer" />
      <page pageid="690" ns="0" title="Barbed Legplates" />
      <page pageid="37" ns="0" title="Bard" />
      <page pageid="933" ns="0" title="Bards" />
      <page pageid="767" ns="0" title="Bark Shield" />
      <page pageid="862" ns="0" title="Baron&#039;s Cadenza" />
    </pages>
  </query>
</api>