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>
    <allredirects garcontinue="Město_Jílové|240" />
  </query-continue>
  <query>
    <pages>
      <page pageid="108" ns="0" title="Děčín" />
      <page pageid="182" ns="0" title="Benešov nad Ploučnicí" />
      <page pageid="198" ns="0" title="Alusuisse" />
      <page pageid="235" ns="0" title="Jiříkov" />
      <page pageid="243" ns="0" title="Dolní Poustevna" />
      <page pageid="442" ns="0" title="Chřibská" />
      <page pageid="456" ns="0" title="Dolský Mlýn" />
      <page pageid="789" ns="0" title="Kovošrot" />
      <page pageid="808" ns="0" title="Kaufland" />
      <page pageid="999" ns="0" title="Vlakové nádraží Děčín" />
    </pages>
  </query>
</api>