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>
    <alltransclusions gatcontinue="Coordinates|915" />
  </query-continue>
  <query>
    <pages>
      <page pageid="595" ns="0" title="Beth Pinchas (Bostoner)" />
      <page pageid="827" ns="0" title="Agudas Yisroel of Montreal" />
      <page pageid="891" ns="0" title="Satmer" />
      <page pageid="895" ns="0" title="Kenesseth Israel Congregation" />
      <page pageid="897" ns="0" title="Congregation Bais Yisroel" />
      <page pageid="898" ns="0" title="Breadsmith" />
      <page pageid="900" ns="0" title="Cooper&#039;s Food Grocery Store" />
      <page pageid="1410" ns="0" title="Main Page" />
      <page pageid="1910" ns="0" title="Berrylicious" />
      <page pageid="2556" ns="0" title="JEWISH TRAVEL" />
    </pages>
  </query>
</api>