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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>
    <allfileusages gafcontinue="CNH_Lakes_Year_2_Report.pdf|698" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Main Page" />
      <page pageid="160" ns="0" title="Year 2 workshop" />
      <page pageid="166" ns="0" title="Authorship policy" />
      <page pageid="343" ns="0" title="Complete draft policy revisions" />
      <page pageid="380" ns="0" title="1 April 2016 teleconference" />
      <page pageid="382" ns="0" title="Our research questions" />
      <page pageid="700" ns="0" title="Year 1 Project Report" />
      <page pageid="850" ns="0" title="Mgmt and Team Science MS" />
    </pages>
  </query>
</api>