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"?>
    <allredirects garcontinue="Bad_Vöslau" />
      <page pageid="3075" ns="0" title="Babenberg Lipót" />
      <page pageid="15605" ns="0" title="Bacska" />
      <page pageid="15606" ns="0" title="Bad Dürrenberg" />
      <page pageid="14859" ns="0" title="Bad Gastein" />
      <page pageid="15607" ns="0" title="Bad Hersfeld" />
      <page pageid="17171" ns="0" title="Bad Ischl" />
      <page pageid="15608" ns="0" title="Bad Langensalza" />
      <page pageid="15609" ns="0" title="Bad Mitterndorf" />
      <page pageid="15610" ns="0" title="Bad Radkersburg" />
      <page pageid="15632" ns="0" title="Bad Sulza" />