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>
    <random>
      <page id="95" ns="0" title="リリース情報:バンドルプラグイン対応表:開発版Version3.0～Version3.2beta" />
      <page id="77" ns="0" title="バンドルプラグイン:リリース履歴:opRankingPlugin" />
    </random>
  </query>
</api>