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>
    <allfileusages gafcontinue="FSD-Small-PNG.png|600" />
  </query-continue>
  <query>
    <pages>
      <page pageid="23" ns="0" title="FairShares Association" />
      <page pageid="592" ns="0" title="FairShares Diagnostics" />
      <page pageid="593" ns="0" title="Initial Social Audit" />
      <page pageid="594" ns="0" title="Initial Participation Audit" />
      <page pageid="595" ns="0" title="Initial Governance Audit" />
      <page pageid="597" ns="0" title="Social Enterprise Survey" />
      <page pageid="598" ns="0" title="Advanced Management Diagnostics" />
      <page pageid="599" ns="0" title="Advanced Participation Diagnostics" />
      <page pageid="615" ns="0" title="FairShares Labs" />
      <page pageid="620" ns="0" title="FairShares Institute" />
    </pages>
  </query>
</api>