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="20140217201229|17908" />
  </query-continue>
  <query>
    <blocks>
      <block id="22979" user="Blibrestez55" by="Helen russian" timestamp="2015-04-22T15:28:42Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" noemail="" />
      <block id="22970" user="Drtammie" by="Pescetti" timestamp="2014-05-31T21:25:26Z" expiry="infinity" reason="Inserting nonsense/gibberish into pages: As explained on users list" nocreate="" noemail="" />
      <block id="22969" user="MellissaBrodzky" by="Pescetti" timestamp="2014-04-03T17:46:37Z" expiry="infinity" reason="Removed the autoblock, see https://issues.apache.org/ooo/show_bug.cgi?id=124572" nocreate="" noemail="" />
      <block id="22170" user="LorenZ24laq" by="Helen russian" timestamp="2014-03-20T14:07:09Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" noemail="" />
      <block id="22169" user="RollandCatron" by="Helen russian" timestamp="2014-03-20T14:05:52Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" noemail="" />
      <block id="20499" user="KiaM10evwx" by="Helen russian" timestamp="2014-03-06T13:18:08Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" noemail="" />
      <block id="19538" user="DeborahHarvard" by="Adailton" timestamp="2014-02-25T11:24:16Z" expiry="infinity" reason="Spamming links to external sites: False information can be seen in the deleted edits from this user" nocreate="" autoblock="" />
      <block id="18604" user="BirgitLandry" by="Yak" timestamp="2014-02-21T06:00:11Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" />
      <block id="18601" user="AngleaFexd" by="Yak" timestamp="2014-02-21T05:59:46Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" />
      <block id="18513" user="RoscoeW38zlqbqg" by="Adailton" timestamp="2014-02-20T18:40:40Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" />
    </blocks>
  </query>
</api>