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>
    <alltransclusions gatcontinue="Navi_cele11|686" />
  </query-continue>
  <query>
    <pages>
      <page pageid="675" ns="0" title="Blinded By Light (FINAL FANTASY XIII)" />
      <page pageid="680" ns="0" title="Chain Lightning" />
      <page pageid="673" ns="0" title="Elvaan Female" />
      <page pageid="685" ns="0" title="FF10シーモアバトル" />
      <page pageid="677" ns="0" title="People of the Far North -Diamond Dust Trance ReMix-" />
      <page pageid="684" ns="0" title="Song of summon" />
      <page pageid="670" ns="0" title="光の4戦士 メインテーマ ファミコン内蔵2A03音源アレンジ" />
      <page pageid="676" ns="0" title="光り誘う「鐵牛の神楽」" />
      <page pageid="682" ns="0" title="愚者の舞 -La Danse Macabre-" />
      <page pageid="674" ns="0" title="誓い～ピアノ×ヴァイオリン～" />
    </pages>
  </query>
</api>