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>
    <allpages apcontinue="Fundstellen_in_Tschad" />
  </query-continue>
  <query>
    <allpages>
      <p pageid="5" ns="0" title="Einfluss des Klimas" />
      <p pageid="1626" ns="0" title="Epipaläolithikum" />
      <p pageid="31" ns="0" title="Fundkomplex Abu Tartur" />
      <p pageid="6" ns="0" title="Fundstellen in Algerien" />
      <p pageid="7" ns="0" title="Fundstellen in Libyen" />
      <p pageid="12" ns="0" title="Fundstellen in Mali" />
      <p pageid="28" ns="0" title="Fundstellen in Marokko" />
      <p pageid="15" ns="0" title="Fundstellen in Mauretanien" />
      <p pageid="14" ns="0" title="Fundstellen in Niger" />
      <p pageid="27" ns="0" title="Fundstellen in Sudan" />
    </allpages>
  </query>
</api>