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>
    <allfileusages gafcontinue="Balance_positive.JPG|3109" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1408" ns="0" title="Backdoor Factory Proxy (BDFProxy)" />
      <page pageid="2825" ns="0" title="Trabajo: Pequeña colaboración con Mozilla Support y con el OpenMRS Community Translation Team" />
      <page pageid="3102" ns="0" title="Trabajo:Juego de mesa para concienciar sobre privilegios" />
      <page pageid="3108" ns="0" title="Equidad y corrección de sesgos en Aprendizaje Automático" />
      <page pageid="3109" ns="0" title="Fairness and bias correction in Machine Learning" />
    </pages>
  </query>
</api>