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="Conflexio" />
  </query-continue>
  <query>
    <pages>
      <page pageid="142" ns="0" title="Blik" />
      <page pageid="15" ns="0" title="Blikbrary" />
      <page pageid="30" ns="0" title="Boutique des Sciences" />
      <page pageid="102" ns="0" title="COVID : Conseils" />
      <page pageid="84" ns="0" title="CRIS" />
      <page pageid="99" ns="0" title="Capacitation du Séniorant" />
      <page pageid="38" ns="0" title="Circonflexio" />
      <page pageid="120" ns="0" title="Circonstances de l&#039;ennui" />
      <page pageid="47" ns="0" title="Citizen science in the Internet era" />
      <page pageid="88" ns="0" title="Confinement : CHM (chercheur hors murs) employeur à domicile" />
    </pages>
  </query>
</api>