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>
    <allpages apcontinue="Barrothian_Technofane_Explorator_Fleet_Report_001~1439161186" />
  </query-continue>
  <query>
    <allpages>
      <p pageid="6739" ns="0" title="Ba Battle for the Thamris Hivettle Report Title" />
      <p pageid="5909" ns="0" title="Badab War" />
      <p pageid="6023" ns="0" title="Badab War Campaign" />
      <p pageid="5911" ns="0" title="Badab War Chapters" />
      <p pageid="6024" ns="0" title="Badab War Phase 1" />
      <p pageid="1841" ns="0" title="Bakayri" />
      <p pageid="4892" ns="0" title="Barbadua" />
      <p pageid="2251" ns="0" title="Barrothian Technofane Explorator Fleet Report 001" />
      <p pageid="2379" ns="0" title="Barrothian Technofane Explorator Fleet Report 001~1439161097" />
      <p pageid="2380" ns="0" title="Barrothian Technofane Explorator Fleet Report 001~1439161150" />
    </allpages>
  </query>
</api>