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>
    <logevents lecontinue="20141127140352|499" />
  </query-continue>
  <query>
    <logevents>
      <item logid="509" action="patrol" ns="0" title="LaTeX/Mathematics" pageid="50" logpage="50" type="patrol" user="Nicolas Brouard" timestamp="2019-10-26T16:51:33Z" comment="">
        <patrol cur="499" prev="498" auto="1" />
      </item>
      <item logid="508" action="patrol" ns="0" title="LaTeX/Mathematics" pageid="50" logpage="50" type="patrol" user="Nicolas Brouard" timestamp="2019-10-26T16:43:05Z" comment="">
        <patrol cur="498" prev="137" auto="1" />
      </item>
      <item logid="507" action="patrol" ns="0" title="LaTeX/Importing Graphics" pageid="40" logpage="40" type="patrol" user="Nicolas Brouard" timestamp="2015-01-28T12:40:04Z" comment="">
        <patrol cur="497" prev="496" auto="1" />
      </item>
      <item logid="506" action="patrol" ns="0" title="LaTeX/Importing Graphics" pageid="40" logpage="40" type="patrol" user="Nicolas Brouard" timestamp="2015-01-28T12:39:33Z" comment="">
        <patrol cur="496" prev="452" auto="1" />
      </item>
      <item logid="505" action="patrol" ns="0" title="Accueil" pageid="1" logpage="1" type="patrol" user="Nicolas Brouard" timestamp="2014-12-10T13:50:30Z" comment="">
        <patrol cur="495" prev="494" auto="1" />
      </item>
      <item logid="504" action="patrol" ns="0" title="Accueil" pageid="1" logpage="1" type="patrol" user="Nicolas Brouard" timestamp="2014-12-04T19:02:33Z" comment="">
        <patrol cur="494" prev="487" auto="1" />
      </item>
      <item logid="503" action="delete" ns="8" title="MediaWiki:Gadget-refToolbar/en" pageid="0" logpage="0" type="delete" user="Nicolas Brouard" timestamp="2014-11-27T14:07:05Z" comment="contenait « // install [[Wikipedia:User:Cacycle/wikEd]] in-browser text editor importScriptURI(&#039;http://en.wikipedia.org/w/index.php?title=User:Cacycle/wikEd... » (et son seul contributeur était [[Special:Contributions/Nicolas Brouard|Nicolas Brouard]])" />
      <item logid="502" action="patrol" ns="8" title="MediaWiki:Gadget-wikEd.js" pageid="108" logpage="108" type="patrol" user="Nicolas Brouard" timestamp="2014-11-27T14:06:50Z" comment="">
        <patrol cur="493" prev="0" auto="1" />
      </item>
      <item logid="501" action="patrol" ns="8" title="MediaWiki:Gadget-refToolbar/en" pageid="0" logpage="107" type="patrol" user="Nicolas Brouard" timestamp="2014-11-27T14:06:29Z" comment="">
        <patrol cur="492" prev="0" auto="1" />
      </item>
      <item logid="500" action="patrol" ns="8" title="MediaWiki:Gadget-wikEd/en" pageid="106" logpage="106" type="patrol" user="Nicolas Brouard" timestamp="2014-11-27T14:05:09Z" comment="">
        <patrol cur="491" prev="490" auto="1" />
      </item>
    </logevents>
  </query>
</api>