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="Barock|487" />
  </query-continue>
  <query>
    <pages>
      <page pageid="35" ns="0" title="Grundkurs 12 Musik Spa" />
      <page pageid="717" ns="0" title="Grundkurs 10 Musik Spa" />
      <page pageid="1303" ns="0" title="Aufgaben Kurs 12, 2011, MU G1, Spang" />
      <page pageid="1314" ns="0" title="Musik auf der Bühne" />
      <page pageid="1316" ns="0" title="Musical" />
      <page pageid="3323" ns="0" title="Mutter Teresa" />
      <page pageid="3855" ns="10" title="Vorlage:Cat see also" />
      <page pageid="3873" ns="0" title="Baustelle 8b 2014/14" />
      <page pageid="3927" ns="0" title="Baustelle 8A 2014/2015" />
    </pages>
  </query>
</api>