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|General_guidelines_for_repairs" />
  </query-continue>
  <query>
    <pages>
      <page pageid="6600" ns="0" title="Bugantics" touched="2015-07-14T07:43:50Z" lastrevid="153374" counter="2455" length="18" new="" />
      <page pageid="1417" ns="0" title="Bugatti articles" touched="2013-03-30T08:44:20Z" lastrevid="32499" counter="4710" length="327" />
      <page pageid="2161" ns="0" title="Bugatti books" touched="2011-09-25T16:33:05Z" lastrevid="31843" counter="11766" length="6830" />
      <page pageid="3913" ns="0" title="Bugatti clubs and communities" touched="2008-02-14T18:51:28Z" lastrevid="12967" counter="2723" length="28" new="" />
      <page pageid="1772" ns="0" title="Bugatti history" touched="2007-10-07T19:46:37Z" lastrevid="6989" counter="3662" length="121" />
      <page pageid="3682" ns="0" title="Bugatti people" touched="2009-02-17T13:09:58Z" lastrevid="29619" counter="4461" length="1111" />
      <page pageid="5344" ns="0" title="Bugatti philately" touched="2009-02-17T13:13:51Z" lastrevid="22704" counter="2710" length="1793" />
      <page pageid="2587" ns="0" title="Bugatti scale models" touched="2009-12-27T17:51:09Z" lastrevid="31674" counter="7543" length="5988" />
      <page pageid="6377" ns="0" title="Bugatti specifications" touched="2009-07-09T13:11:58Z" lastrevid="31663" counter="3730" length="15" new="" />
      <page pageid="1405" ns="0" title="Bugattis by type" touched="2012-03-18T15:12:37Z" lastrevid="31979" counter="19611" length="22390" />
    </pages>
  </query>
</api>