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>
    <alllinks galcontinue="Model_Railroads_in_the_Backyard" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Calendar and Open House Days for REGRS Club Members" missing="" />
      <page ns="0" title="Directory of Members&#039; Pages" missing="" />
      <page ns="0" title="Kits and Scratch-Built Structures" missing="" />
      <page pageid="24" ns="0" title="Don Herzog&#039;s &quot;Plant of the Month&quot;" />
      <page pageid="12" ns="0" title="Electric and Live Steam Power" />
      <page pageid="40" ns="0" title="Garden Railway Manufacturers List" />
      <page pageid="43" ns="0" title="Garden Railway Photography" />
      <page pageid="26" ns="0" title="June, 2016: Elfin Thyme" />
      <page pageid="49" ns="0" title="Miniature Conifers" />
      <page pageid="53" ns="0" title="Miniature Ground Covers" />
    </pages>
  </query>
</api>