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>
    <allredirects garcontinue="Black_Wax_Idol|6923" />
  </query-continue>
  <query>
    <pages>
      <page pageid="4725" ns="0" title="Anger Issues" />
      <page pageid="6732" ns="0" title="Spawn Trapping" />
      <page pageid="6733" ns="0" title="Spawn-Trapping" />
      <page pageid="9121" ns="0" title="Bastion (Upgrade)" />
      <page pageid="11201" ns="0" title="Bad Juju" />
      <page pageid="13521" ns="0" title="Badger CCL" />
      <page pageid="13701" ns="0" title="Baxx, The Gravekeeper" />
      <page pageid="13868" ns="0" title="Battle of Twilight Gap" />
      <page pageid="17882" ns="0" title="Battlecage of Kabr" />
      <page pageid="18016" ns="0" title="Angry" />
    </pages>
  </query>
</api>