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="Bernard_Courtois" />
  </query-continue>
  <query>
    <allpages>
      <p pageid="4379" ns="0" title="BADRI N. VELLAMBI" />
      <p pageid="4660" ns="0" title="Babak Janjan" />
      <p pageid="2186" ns="0" title="Bassam Dally" />
      <p pageid="2313" ns="0" title="Behnam Jamali" />
      <p pageid="1466" ns="0" title="Ben Chifley" />
      <p pageid="2070" ns="0" title="Benito Gonzalez" />
      <p pageid="2137" ns="0" title="Benjamin S.-Y. Ung" />
      <p pageid="4386" ns="0" title="Benjamin Seam Yu Ung" />
      <p pageid="2236" ns="0" title="Benjamin Thompson" />
      <p pageid="4104" ns="0" title="Bernabé Linares-Barranco" />
    </allpages>
  </query>
</api>