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="Bring" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Battle.net" missing="" />
      <page ns="0" title="Bengalaas" missing="" />
      <page ns="0" title="Bengalaas (Jungle Critter)" missing="" />
      <page ns="0" title="BinEdit" missing="" />
      <page ns="0" title="Bin dialog file format" missing="" />
      <page ns="0" title="Bin dialog reference" missing="" />
      <page ns="0" title="Binary countoff" missing="" />
      <page ns="0" title="Binary countoffs" missing="" />
      <page ns="0" title="Blind" missing="" />
      <page pageid="65" ns="0" title="Binary Countoffs" />
    </pages>
  </query>
</api>