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="CCRMA_IPL_Studio_C_User_Guide|2185" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1313" ns="2" title="User:Rob" />
      <page pageid="1752" ns="0" title="Music in Virtual Worlds" />
      <page pageid="1961" ns="0" title="256a-fall-2009/final" />
      <page pageid="1965" ns="0" title="220b-winter-2010" />
      <page pageid="2369" ns="0" title="Fall Colloq 2011" />
      <page pageid="2374" ns="0" title="User Webspace" />
      <page pageid="2426" ns="0" title="Fall Colloq 2012" />
      <page pageid="2662" ns="0" title="UDKOSC DEV" />
      <page pageid="2710" ns="0" title="Fall Colloq 2013" />
      <page pageid="3052" ns="0" title="Fall Colloq 2014" />
    </pages>
  </query>
</api>