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>
    <links plcontinue="1|0|ECE438" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Main Page">
        <links>
          <pl ns="0" title="2015 Fall MA 375 Walther" />
          <pl ns="0" title="2016 Spring ECE 662 Boutin" />
          <pl ns="0" title="2016 Spring MA 279 Walther" />
          <pl ns="0" title="2016 Spring MA 375 Walther" />
          <pl ns="0" title="2019 Fall ECE 438 Boutin" />
          <pl ns="0" title="2019 Spring ECE 301 Boutin" />
          <pl ns="0" title="2022 Fall MA 279 Swanson" />
          <pl ns="0" title="Discrete-time Fourier transform info" />
          <pl ns="0" title="ECE301" />
          <pl ns="0" title="ECE302" />
        </links>
      </page>
    </pages>
  </query>
</api>