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="Barcoding_technologies|353" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Main Page" />
      <page pageid="256" ns="0" title="Drug recalls" />
      <page pageid="258" ns="0" title="MedWatch" />
      <page pageid="261" ns="0" title="Five rights" />
      <page pageid="265" ns="0" title="Vaccine Adverse Event Reporting System" />
      <page pageid="269" ns="0" title="High-alert medications" />
      <page pageid="270" ns="0" title="Tallman lettering" />
      <page pageid="274" ns="0" title="Antidote" />
      <page pageid="276" ns="0" title="Medication errors" />
      <page pageid="292" ns="0" title="Risk evaluation and mitigation strategies" />
    </pages>
  </query>
</api>