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.S_Sacramenti|1416" />
  </query-continue>
  <query>
    <pages>
      <page pageid="46" ns="0" title="Arch Bishop" />
      <page pageid="212" ns="0" title="Skill and Mechanic Changes" />
      <page pageid="242" ns="0" title="Priest" />
      <page pageid="255" ns="0" title="High Priest" />
      <page pageid="335" ns="10" title="Template:Navbox Priest" />
      <page pageid="1030" ns="0" title="Holy" />
      <page pageid="1064" ns="0" title="Safety Wall" />
      <page pageid="1068" ns="0" title="Increase Spiritual Power" />
      <page pageid="1214" ns="0" title="Aspersio" />
      <page pageid="1343" ns="0" title="Assumptio" />
    </pages>
  </query>
</api>