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="Contextual_Music" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Bugzilla:8912" missing="" />
      <page ns="0" title="Card design rationale" missing="" />
      <page ns="0" title="Categories" missing="" />
      <page ns="0" title="CollapsibleInfobox" missing="" />
      <page pageid="71" ns="0" title="Beacon Locator" />
      <page pageid="72" ns="0" title="Breath" />
      <page pageid="73" ns="0" title="Character Soundprint" />
      <page pageid="74" ns="0" title="Chitchat" />
      <page pageid="75" ns="0" title="Consequent Sound" />
      <page pageid="3515" ns="0" title="Contacts" />
    </pages>
  </query>
</api>