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>
    <recentchanges rccontinue="20160807100659|325" />
  </query-continue>
  <query>
    <recentchanges>
      <rc type="log" ns="0" title="Standard Procedure" pageid="97" revid="0" old_revid="0" rcid="345" timestamp="2017-03-09T19:29:04Z" />
      <rc type="log" ns="0" title="Test" pageid="96" revid="0" old_revid="0" rcid="344" timestamp="2017-03-09T19:28:53Z" />
      <rc type="edit" ns="0" title="Lamont-Doherty Core Repository Sediment Cores and Dredges" pageid="61" revid="324" old_revid="301" rcid="333" timestamp="2016-09-07T22:32:49Z" />
      <rc type="new" ns="102" title="Property:Has moon samples" pageid="95" revid="323" old_revid="0" rcid="332" timestamp="2016-09-07T22:32:49Z" />
      <rc type="edit" ns="0" title="Polar Rock Repository" pageid="74" revid="322" old_revid="320" rcid="331" timestamp="2016-08-07T10:07:57Z" />
      <rc type="new" ns="0" title="Dredges" pageid="94" revid="321" old_revid="0" rcid="330" timestamp="2016-08-07T10:07:57Z" />
      <rc type="edit" ns="0" title="Polar Rock Repository" pageid="74" revid="320" old_revid="319" rcid="329" timestamp="2016-08-07T10:07:50Z" />
      <rc type="edit" ns="0" title="Polar Rock Repository" pageid="74" revid="319" old_revid="230" rcid="328" timestamp="2016-08-07T10:07:39Z" />
      <rc type="edit" ns="0" title="Wisconsin Geological and Natural History Survey" pageid="79" revid="318" old_revid="317" rcid="327" timestamp="2016-08-07T10:07:10Z" />
      <rc type="edit" ns="0" title="Wisconsin Geological and Natural History Survey" pageid="79" revid="317" old_revid="316" rcid="326" timestamp="2016-08-07T10:07:05Z" />
    </recentchanges>
  </query>
</api>