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="20170221062049|3533" />
  </query-continue>
  <query>
    <logevents>
      <item logid="3543" ns="0" title="Не найден электронный ключ или Неверный электронный ключ" pageid="980" logpage="980" type="patrol" action="patrol" user="Admin" timestamp="2017-10-24T07:52:56Z" comment="">
        <patrol cur="3781" prev="3780" auto="1" />
      </item>
      <item logid="3542" ns="0" title="Не найден электронный ключ или Неверный электронный ключ" pageid="980" logpage="980" type="patrol" action="patrol" user="Admin" timestamp="2017-10-24T07:52:09Z" comment="">
        <patrol cur="3780" prev="3553" auto="1" />
      </item>
      <item logid="3541" ns="0" title="УПРЗА &quot;Эколог&quot;" pageid="4" logpage="4" type="patrol" action="patrol" user="Admin" timestamp="2017-09-28T09:21:37Z" comment="">
        <patrol cur="3779" prev="3697" auto="1" />
      </item>
      <item logid="3540" ns="14" title="Категория:Ошибки" pageid="795" logpage="795" type="patrol" action="patrol" user="Admin" timestamp="2017-08-22T08:19:34Z" comment="">
        <patrol cur="3778" prev="3776" auto="1" />
      </item>
      <item logid="3539" ns="0" title="Ошибка при открытии справочника веществ: C Pol Индекс не найден" pageid="1042" logpage="1042" type="patrol" action="patrol" user="Admin" timestamp="2017-08-18T10:18:14Z" comment="">
        <patrol cur="3777" prev="0" auto="1" />
      </item>
      <item logid="3538" ns="14" title="Категория:Ошибки" pageid="795" logpage="795" type="patrol" action="patrol" user="Admin" timestamp="2017-08-18T10:14:57Z" comment="">
        <patrol cur="3776" prev="3769" auto="1" />
      </item>
      <item logid="3537" ns="0" title="Ошибка после установки НДС-Эколог" pageid="1041" logpage="1041" type="patrol" action="patrol" user="Admin" timestamp="2017-08-03T09:57:16Z" comment="">
        <patrol cur="3775" prev="3774" auto="1" />
      </item>
      <item logid="3536" ns="0" title="Ошибка после установки НДС-Эколог" pageid="1041" logpage="1041" type="patrol" action="patrol" user="Admin" timestamp="2017-08-03T09:36:27Z" comment="">
        <patrol cur="3774" prev="0" auto="1" />
      </item>
      <item logid="3535" ns="0" title="Ошибка 7009 в ПДВ-Эколог при формировании таблиц" pageid="1039" logpage="1039" type="patrol" action="patrol" user="Admin" timestamp="2017-02-21T06:21:17Z" comment="">
        <patrol cur="3773" prev="3772" auto="1" />
      </item>
      <item logid="3534" ns="0" title="Ошибка 7009 в ПДВ-Эколог при формировании таблиц" pageid="1039" logpage="1039" type="patrol" action="patrol" user="Admin" timestamp="2017-02-21T06:20:55Z" comment="">
        <patrol cur="3772" prev="3770" auto="1" />
      </item>
    </logevents>
  </query>
</api>