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 arcontinue="Braun_400_Motor-Zoom-Reflex|4164" />
  </query-continue>
  <query>
    <allredirects>
      <r fromid="6598" ns="0" title="Batacon Sound 100 Projector" />
      <r fromid="6623" ns="0" title="Bauer C 3 Super" />
      <r fromid="6616" ns="0" title="Bauer S 609 XL Microprocessor" />
      <r fromid="2562" ns="0" title="Beaulieu 6008S vs. Canon 1014XL vs. Elmo 1012XL" />
      <r fromid="3064" ns="0" title="Beaulieu 9008 Pro 16:9" />
      <r fromid="3063" ns="0" title="Beaulieu 9008 S 16:9" />
      <r fromid="3971" ns="0" title="Bell and Howell 1236 XL Filmosonic" />
      <r fromid="2563" ns="0" title="Big camera comparison chart" />
      <r fromid="4433" ns="0" title="Bolex 18-5 Super Projector" />
      <r fromid="3247" ns="0" title="Bolex 583 Sound Macrozoom" />
    </allredirects>
  </query>
</api>