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="CoTopbar.png|119" />
  </query-continue>
  <query>
    <pages>
      <page pageid="56" ns="0" title="Carla Emery" />
      <page pageid="113" ns="0" title="Jacob Springs honey program" />
      <page pageid="118" ns="0" title="Jacob Springs topbar hive" />
      <page pageid="121" ns="0" title="Topbar beehive" />
      <page pageid="189" ns="0" title="Agronimo" />
      <page pageid="293" ns="0" title="Milk cooling chest" />
      <page pageid="47216" ns="0" title="Chick brooder" />
    </pages>
  </query>
</api>