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="Dibal_D900" />
  </query-continue>
  <query>
    <allpages>
      <p pageid="1149" ns="0" title="Bizerba BC II 800" />
      <p pageid="1232" ns="0" title="Bizerba SC II 800" />
      <p pageid="1016" ns="0" title="Bizerba XC800" />
      <p pageid="1268" ns="0" title="Build 4089" />
      <p pageid="1775" ns="0" title="CAS CL 3000" />
      <p pageid="1776" ns="0" title="CAS CL 5000" />
      <p pageid="1170" ns="0" title="Datecs FP-320" />
      <p pageid="1157" ns="0" title="Datecs FP-3530T" />
      <p pageid="1160" ns="0" title="Datecs FP-T260" />
      <p pageid="1600" ns="0" title="Dibal 500 series" />
    </allpages>
  </query>
</api>