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 alcontinue="Drug_Price_Competition_and_Patent-Term_Restoration_Act" />
  </query-continue>
  <query>
    <alllinks>
      <l ns="0" title="Barcoding technologies" />
      <l ns="0" title="Barcoding technology" />
      <l ns="0" title="Best Pharmaceuticals for Children Act" />
      <l ns="0" title="Combat Methamphetamine Epidemic Act" />
      <l ns="0" title="Compounding" />
      <l ns="0" title="Comprehensive Drug Abuse Prevention and Control Act" />
      <l ns="0" title="Dietary Supplement Health and Education Act" />
      <l ns="0" title="Dietary Supplements and Health Education Act" />
      <l ns="0" title="Drug Addiction Treatment Act" />
      <l ns="0" title="Drug Enforcement Administration" />
    </alllinks>
  </query>
</api>