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 lestart="2018-06-10T20:26:57Z" />
  </query-continue>
  <query>
    <logevents>
      <item logid="443" pageid="280" ns="6" title="Файл:Geometrija oval2.jpg" type="upload" action="upload" user="Maria" timestamp="2019-09-09T18:01:19Z" comment="" />
      <item logid="442" pageid="279" ns="6" title="Файл:Geometrija oval.jpg" type="upload" action="upload" user="Maria" timestamp="2019-09-09T17:59:18Z" comment="" />
      <item logid="441" pageid="278" ns="6" title="Файл:Geometrija krug.jpg" type="upload" action="upload" user="Maria" timestamp="2019-09-09T17:44:13Z" comment="" />
      <item logid="440" pageid="277" ns="6" title="Файл:Geometrija kvadrat.jpg" type="upload" action="upload" user="Maria" timestamp="2019-09-09T17:42:05Z" comment="" />
      <item logid="439" pageid="275" ns="6" title="Файл:Bessozn6.jpg" type="upload" action="upload" user="Maria" timestamp="2019-02-23T17:36:19Z" comment="" />
      <item logid="438" pageid="274" ns="6" title="Файл:Bessozn5.jpg" type="upload" action="upload" user="Maria" timestamp="2019-02-23T17:34:39Z" comment="" />
      <item logid="437" pageid="273" ns="6" title="Файл:Bessozn4.jpg" type="upload" action="upload" user="Maria" timestamp="2019-02-23T17:31:44Z" comment="" />
      <item logid="436" pageid="272" ns="6" title="Файл:Bessozn3.jpg" type="upload" action="upload" user="Maria" timestamp="2019-02-23T17:27:40Z" comment="" />
      <item logid="435" pageid="271" ns="6" title="Файл:Bessozn21.jpg" type="upload" action="upload" user="Maria" timestamp="2019-02-23T17:19:04Z" comment="" />
      <item logid="434" pageid="270" ns="6" title="Файл:Bessozn1.jpg" type="upload" action="upload" user="Maria" timestamp="2019-02-23T17:08:25Z" comment="" />
    </logevents>
  </query>
</api>