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="Cryptocurrency" />
  </query-continue>
  <query>
    <allredirects>
      <r ns="0" title="Backspace Generation" />
      <r ns="0" title="Blade Runner" />
      <r ns="0" title="Brain-Computer Interface" />
      <r ns="0" title="Cargo Cult Programming" />
      <r ns="0" title="Cargo Cult Software" />
      <r ns="0" title="Chorded Keyboard" />
      <r ns="0" title="Cities and Cyborgs: Computing and the Metropolis, 1860-2010" />
      <r ns="0" title="Compulsion Loops" />
      <r ns="0" title="Contributing to CyborgAnthropology.com" />
      <r ns="0" title="Coordinated Universal Time" />
    </allredirects>
  </query>
</api>