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="BA15CF58-DCB3-425A-BAFC-EBD8CBBF670C.jpeg|2091" />
      <page pageid="1341" ns="0" title="東京工業大学" />
      <page pageid="1468" ns="0" title="ポセイドン・石川" />
      <page pageid="1655" ns="0" title="奈良女子大学" />
      <page pageid="1795" ns="0" title="宇都宮大学" />
      <page pageid="2029" ns="0" title="ムロツヨシ" />
      <page pageid="2118" ns="0" title="THE ORAL CIGARETTES" />
      <page pageid="2177" ns="0" title="スガシカオ" />
      <page pageid="2517" ns="0" title="山口県立岩国高等学校" />
      <page pageid="2696" ns="0" title="スキマスイッチ" />