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="HCard" />
      <page ns="0" title="Boston&#039;s Historic South End" missing="" />
      <page ns="0" title="Boston, Massachusetts" missing="" />
      <page ns="0" title="Boston College" missing="" />
      <page ns="0" title="Corgi" missing="" />
      <page ns="0" title="Drawing" missing="" />
      <page ns="0" title="Find &amp; Form" missing="" />
      <page ns="0" title="Find &amp; Form Space" missing="" />
      <page ns="0" title="Geo microformat" missing="" />
      <page pageid="39" ns="0" title="Citation needed" />
      <page pageid="29" ns="0" title="County seat" />