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>
    <alllinks galcontinue="Grow_linux_partitions_on_live_system" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="CSS" missing="" />
      <page pageid="14" ns="0" title="C++ interview" />
      <page pageid="11" ns="0" title="CentOS 5 Build FFmpeg with X264" />
      <page pageid="65" ns="0" title="Configure SSL Bump on squid 3.3" />
      <page pageid="64" ns="0" title="Convert Seconds to Human Readable Duration" />
      <page pageid="8" ns="0" title="FFMPEG Commands" />
      <page pageid="10" ns="0" title="FFMPEG Development" />
      <page pageid="12" ns="0" title="FFMPEG windows build procedure" />
      <page pageid="78" ns="0" title="Fusionio driver" />
      <page pageid="83" ns="0" title="Github Action Runner" />
    </pages>
  </query>
</api>