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 arcontinue="Big_Mountain_Fudgecake" />
      <r ns="0" title="B-Rabbit" />
      <r ns="0" title="B.J. and the Affordables" />
      <r ns="0" title="Balin Son of Dwalin" />
      <r ns="0" title="Barbi and Jeff Gordon" />
      <r ns="0" title="Barbie and the Sensations" />
      <r ns="0" title="Barker and McGuffey" />
      <r ns="0" title="Barrett Rude Jr. and the Subtle Distinctions" />
      <r ns="0" title="Barry Jive and the Uptown Five" />
      <r ns="0" title="Bennie and the Jets" />
      <r ns="0" title="Benson Dunwoody" />