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"?>
    <links plcontinue="1|0|HAARP" />
      <page pageid="1" ns="0" title="Main Page">
          <pl ns="0" title="ARS-USB and Yeasu G4500" />
          <pl ns="0" title="Broadcast radio" />
          <pl ns="0" title="Cognitive Radio" />
          <pl ns="0" title="DATV" />
          <pl ns="0" title="Digital Voice Radio" />
          <pl ns="0" title="Distributed RF Scanner Array" />
          <pl ns="0" title="Electronics shops" />
          <pl ns="0" title="Famous Hams" />
          <pl ns="0" title="Frequenties omgeving Leiden" />
          <pl ns="0" title="GnuRadio for Adalm-Pluto Ubuntu Bionic 18.04" />