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="City_of_Argos|325" />
  </query-continue>
  <query>
    <pages>
      <page pageid="304" ns="0" title="The Center of the City of Argos" />
      <page pageid="409" ns="0" title="Acid Quest" />
      <page pageid="410" ns="0" title="Blood Red Vambraces of Retribution" />
      <page pageid="412" ns="0" title="Blood Red Sharv of Discipline" />
      <page pageid="413" ns="0" title="Blood Red Plate Mail of Retribution" />
      <page pageid="414" ns="0" title="Pair of Blood Red Boots" />
      <page pageid="532" ns="0" title="Pair of Blood Red Helm" />
      <page pageid="552" ns="0" title="Capacitor" />
      <page pageid="585" ns="0" title="Lead Weight on a Hook" />
      <page pageid="714" ns="0" title="Pair of Fisted Lead Gauntlets" />
    </pages>
  </query>
</api>