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="Baby_dragon|4392" />
  </query-continue>
  <query>
    <pages>
      <page pageid="751" ns="0" title="Lewis Gun" />
      <page pageid="780" ns="0" title="Milcam" />
      <page pageid="2857" ns="0" title="BRR Tactical" />
      <page pageid="2858" ns="0" title="BRR" />
      <page pageid="5835" ns="0" title="BSA Welrod" />
      <page pageid="5836" ns="0" title="Welrod Mk I" />
      <page pageid="5837" ns="0" title="Welrod MkI" />
      <page pageid="5838" ns="0" title="Welrod Mark I" />
      <page pageid="5839" ns="0" title="Welrod" />
      <page pageid="5840" ns="0" title="Rod" />
    </pages>
  </query>
</api>