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="Basin_Complex_Fire_Erosion_and_Debris_Flows" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="BIL File Format" missing="" />
      <page ns="0" title="BLM Central California District Office" missing="" />
      <page ns="0" title="BLM Central Coast Field Office" missing="" />
      <page pageid="1931" ns="0" title="BIA" />
      <page pageid="1425" ns="0" title="BLM" />
      <page pageid="1178" ns="0" title="BSLT" />
      <page pageid="736" ns="0" title="BU" />
      <page pageid="1768" ns="0" title="Backcountry Hunters and Anglers" />
      <page pageid="1366" ns="0" title="Basin-Indians Fire Erosion and Debris Flows" />
      <page pageid="38" ns="0" title="Basin-Indians Wildfire in California&#039;s Central Coast Region" />
    </pages>
  </query>
</api>