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"?>
    <alllinks galcontinue="Diet" />
      <page pageid="1115" ns="0" title="B12 shots" />
      <page pageid="1031" ns="0" title="Bacteria in gut" />
      <page pageid="758" ns="0" title="Bonding" />
      <page pageid="771" ns="0" title="Books" />
      <page pageid="1024" ns="0" title="Breathing" />
      <page pageid="1041" ns="0" title="Brown Fat" />
      <page pageid="1042" ns="0" title="Burning Stored Fat" />
      <page pageid="1032" ns="0" title="Carnitine fumarate" />
      <page pageid="729" ns="0" title="CoQ10" />
      <page pageid="1028" ns="0" title="Creatine" />