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="Using_OpenID" />
  </query-continue>
  <query>
    <allpages>
      <p pageid="41" ns="0" title="Building Your Resume" />
      <p pageid="11" ns="0" title="Computer Graphics" />
      <p pageid="2" ns="0" title="Git in Government" />
      <p pageid="12" ns="0" title="Image Synthesis" />
      <p pageid="10" ns="0" title="Interviewing a Technical Candidate" />
      <p pageid="40" ns="0" title="Juniper Pulse on 64-bit Linux" />
      <p pageid="1" ns="0" title="Main Page" />
      <p pageid="43" ns="0" title="Roger Gracie BJJ Competion Breakdown" />
      <p pageid="42" ns="0" title="Roger Gracie BJJ Footage" />
      <p pageid="4" ns="0" title="Security Tips" />
    </allpages>
  </query>
</api>