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>
  <parse title="SuperTux:Sandbox" revid="14608" displaytitle="SuperTux:Sandbox">
    <text xml:space="preserve">&lt;blockquote style=&quot;background: white; border: 1px dotted black; padding: 1em;&quot;&gt;&lt;i&gt;Welcome to the &lt;b&gt;SuperTux Wiki Sandbox!&lt;/b&gt; Please feel free to conduct your experiments with formatting and and editing skills on this page. You may place anything here; however, nothing copyrighted, offensive, or related to spam. To edit this page, click on the &lt;b&gt;edit&lt;/b&gt; button on the top of the page. Nothing is permanent, as this page is cleaned every once in a while.&lt;/i&gt; &lt;/blockquote&gt;
&lt;p&gt;Mediawiki Update Test
&lt;/p&gt;&lt;p&gt;So, no more error message when editing? --&lt;a href=&quot;/wiki/User:WolfgangB&quot; title=&quot;User:WolfgangB&quot;&gt;WolfgangB&lt;/a&gt; (&lt;a href=&quot;/wiki/User_talk:WolfgangB&quot; title=&quot;User talk:WolfgangB&quot;&gt;talk&lt;/a&gt;) 19:15, 18 August 2014 (UTC)
&lt;/p&gt;
&lt;!-- 
NewPP limit report
CPU time usage: 0.018 seconds
Real time usage: 0.024 seconds
Preprocessor visited node count: 4/1000000
Preprocessor generated node count: 16/1000000
Post‐expand include size: 471/2097152 bytes
Template argument size: 0/2097152 bytes
Highest expansion depth: 2/40
Expensive parser function count: 0/100
--&gt;

&lt;!-- Saved in parser cache with key supertux-stwiki_:pcache:idhash:1229-0!*!0!*!*!*!* and timestamp 20191015063854 and revision id 14608
 --&gt;
</text>
    <langlinks />
    <categories />
    <links>
      <pl ns="2" exists="" xml:space="preserve">User:WolfgangB</pl>
      <pl ns="3" exists="" xml:space="preserve">User talk:WolfgangB</pl>
    </links>
    <templates>
      <tl ns="10" exists="" xml:space="preserve">Template:Please don't edit this line. Thanks!</tl>
    </templates>
    <images />
    <externallinks />
    <sections />
    <iwlinks />
    <properties />
  </parse>
</api>