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>
    <search>
      <p ns="0" title="How to Tune an SSD" snippet="&amp;lt;li&amp;gt;When first partitioning your SSD, make sure it is &amp;quot;aligned&amp;quot; - &lt;span class=&#039;searchmatch&#039;&gt;meaning&lt;/span&gt; that the block size of your filesystem will align with the block size of yo&#10;" size="10965" wordcount="1848" timestamp="2013-09-10T08:10:18Z" />
      <p ns="0" title="How to install a different kernel" snippet="...r installing the kernel manually. In some cases, if there is a regression, &lt;span class=&#039;searchmatch&#039;&gt;meaning&lt;/span&gt; hardware that used to be supported doesn&#039;t work any more, you might actuall&#10;" size="5101" wordcount="808" timestamp="2018-08-13T13:20:51Z" />
    </search>
  </query>
</api>