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"?>
    <allfileusages gafcontinue="Imbox_notice.png|100" />
      <page pageid="65" ns="0" title="Falcon High School" />
      <page pageid="77" ns="0" title="School District 49" />
      <page pageid="84" ns="0" title="Ridgeview Elementary School" />
      <page pageid="168" ns="10" title="Template:Cleanup-infobox" />
      <page pageid="211" ns="10" title="Template:Dmbox" />
      <page pageid="269" ns="10" title="Template:Infobox requested" />
      <page pageid="300" ns="10" title="Template:New infobox" />
      <page pageid="636" ns="490" title="Profile:Connie Michaels-Lipp" />
      <page pageid="716" ns="0" title="Website transition in 2014" />
      <page pageid="1041" ns="2" title="User:SaraTate0" />