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="Esteganografía/en" snippet="...&lt;span class=&#039;searchmatch&#039;&gt;meaning&lt;/span&gt; &amp;quot;covered, concealed, or protected&amp;quot;, and graphein (γράφειν) &lt;span class=&#039;searchmatch&#039;&gt;meaning&lt;/span&gt; &amp;quot;writing&amp;quot;. Its Objective is to establish an undercover communication cannel&#10;" size="8093" wordcount="1363" timestamp="2015-12-21T16:11:23Z" />
      <p ns="0" title="Ética hacker/es" snippet="...people mix up being a hacker with being a cracker. Currently, this is the &lt;span class=&#039;searchmatch&#039;&gt;meaning&lt;/span&gt; collected by the RAE. There are &amp;quot;good&amp;quot; hackers that are devoted to learn an&#10;" size="3284" wordcount="535" timestamp="2017-11-27T10:21:24Z" />
      <p ns="0" title="Ethics" snippet="...character&#039;, from ethos, which means &#039;habit&#039;, because &#039;ethics&#039; follows that &lt;span class=&#039;searchmatch&#039;&gt;meaning&lt;/span&gt; and is not this one.&#10;The concept of ethics and its &lt;span class=&#039;searchmatch&#039;&gt;meaning&lt;/span&gt; has been changing over the years, now approaching different ethical types t&#10;" size="3426" wordcount="541" timestamp="2017-07-02T07:38:18Z" />
    </search>
  </query>
</api>