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>
    <allpages apcontinue="CH391L/S14/Ashley&#039;s_First_assignment" />
  </query-continue>
  <query>
    <allpages>
      <p pageid="27661" ns="0" title="BioBricks and Standardized Genetic Parts (Microbes as Machines)" />
      <p pageid="27693" ns="0" title="Biocontainment (Microbes as Machines)" />
      <p pageid="27237" ns="0" title="Biofuels (Biotechnology and Society)" />
      <p pageid="27723" ns="0" title="Biofuels versus Fossil Fuels (Biotechnology and Society 2016)" />
      <p pageid="22" ns="0" title="Bioterrorism (Biotechnology and Society)" />
      <p pageid="20" ns="0" title="Bioterrorism and Dual-Use Research (Biotechnology and Society)" />
      <p pageid="27480" ns="0" title="CH391L/S14/Alex&#039;s First assignment" />
      <p pageid="27525" ns="0" title="CH391L/S14/Ancestral sequence" />
      <p pageid="27566" ns="0" title="CH391L/S14/ApplicationsofOptogenetics" />
      <p pageid="27649" ns="0" title="CH391L/S14/Artemisinin" />
    </allpages>
  </query>
</api>