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="Bed_Bug_Lesson" />
  </query-continue>
  <query>
    <pages>
      <page pageid="128" ns="0" title="Basement mold" />
      <page pageid="271" ns="0" title="Basic Septic Tank and Drain Field" />
      <page pageid="175" ns="0" title="Bathroom Mold and Mildew" />
      <page pageid="23" ns="0" title="Bed Bug Bites" />
      <page pageid="52" ns="0" title="Bed Bug Eradication" />
      <page pageid="50" ns="0" title="Bed Bug Facts and Treatments" />
      <page pageid="107" ns="0" title="Bed Bug Hiding Places" />
      <page pageid="71" ns="0" title="Bed Bug Hunting Dogs" />
      <page pageid="22" ns="0" title="Bed Bug Infestation" />
      <page pageid="43" ns="0" title="Bed Bug Knowledge" />
    </pages>
  </query>
</api>