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>
    <blocks bkcontinue="20171003154216|1116" />
  </query-continue>
  <query>
    <blocks>
      <block id="1132" user="Ustawienie anteny Ruda Śląska nc+" by="Zwiastun" timestamp="2017-12-04T13:11:07Z" expiry="infinity" reason="Spamowanie" nocreate="" autoblock="" />
      <block id="1131" user="Ustawienie anteny Tarnowskie Góry" by="Zwiastun" timestamp="2017-12-04T13:10:29Z" expiry="infinity" reason="Spamowanie" nocreate="" autoblock="" />
      <block id="1130" user="Ustawienie anteny Gliwice" by="Zwiastun" timestamp="2017-12-04T13:09:54Z" expiry="infinity" reason="Spamowanie" nocreate="" autoblock="" />
      <block id="1128" user="Montaż anteny Chorzów" by="Zwiastun" timestamp="2017-12-04T13:09:28Z" expiry="infinity" reason="Spamowanie" nocreate="" autoblock="" />
      <block id="1126" user="SteveH329375" by="Zwiastun" timestamp="2017-10-03T15:46:47Z" expiry="infinity" reason="Spamowanie" nocreate="" autoblock="" />
      <block id="1124" user="Mandy4632867" by="Zwiastun" timestamp="2017-10-03T15:46:11Z" expiry="infinity" reason="Spamowanie" nocreate="" autoblock="" />
      <block id="1122" user="ThaliaCgc0378941" by="Zwiastun" timestamp="2017-10-03T15:45:48Z" expiry="infinity" reason="Spamowanie" nocreate="" autoblock="" />
      <block id="1120" user="BrooksJ02556" by="Zwiastun" timestamp="2017-10-03T15:45:18Z" expiry="infinity" reason="Spamowanie" nocreate="" autoblock="" />
      <block id="1118" user="Gino64M354948" by="Zwiastun" timestamp="2017-10-03T15:44:47Z" expiry="infinity" reason="Spamowanie" nocreate="" autoblock="" />
      <block id="1117" user="Montaż anten Zabrze" by="Zwiastun" timestamp="2017-10-03T15:43:21Z" expiry="infinity" reason="Spamowanie" nocreate="" autoblock="" />
    </blocks>
  </query>
</api>