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>
    <links gplcontinue="1|0|N2PK_VNA" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2" ns="0" title="Debian" contentmodel="wikitext" pagelanguage="en" touched="2013-09-18T20:47:43Z" lastrevid="5" counter="4261" length="7607" new="" />
      <page pageid="4" ns="0" title="Funcube dongle" contentmodel="wikitext" pagelanguage="en" touched="2013-09-18T21:00:36Z" lastrevid="9" counter="4042" length="3680" new="" />
      <page pageid="8" ns="0" title="Arduino" contentmodel="wikitext" pagelanguage="en" touched="2013-10-11T14:05:42Z" lastrevid="22" counter="19631" length="6799" />
      <page pageid="11" ns="0" title="DDS documentation" contentmodel="wikitext" pagelanguage="en" touched="2014-01-28T20:52:47Z" lastrevid="59" counter="53560" length="34468" />
      <page pageid="14" ns="0" title="Current Projects" contentmodel="wikitext" pagelanguage="en" touched="2015-02-11T03:30:43Z" lastrevid="159" counter="33493" length="1392" />
      <page pageid="16" ns="0" title="N2PK SW project" contentmodel="wikitext" pagelanguage="en" touched="2014-04-08T02:56:32Z" lastrevid="80" counter="8068" length="580" />
      <page pageid="20" ns="0" title="Acer Aspire V15 Nitro Linux install notes" contentmodel="wikitext" pagelanguage="en" touched="2016-05-27T15:12:44Z" lastrevid="221" counter="220407" length="84652" />
      <page pageid="21" ns="0" title="Lecture series" contentmodel="wikitext" pagelanguage="en" touched="2016-09-22T16:39:31Z" lastrevid="228" counter="20516" length="1469" />
      <page pageid="22" ns="0" title="HAREC errors in questions" contentmodel="wikitext" pagelanguage="en" touched="2015-01-16T19:46:12Z" lastrevid="131" counter="11066" length="7257" />
      <page pageid="28" ns="0" title="B200" contentmodel="wikitext" pagelanguage="en" touched="2017-05-24T14:41:09Z" lastrevid="232" counter="12414" length="708" />
    </pages>
  </query>
</api>