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>
    <allredirects garcontinue="イラストレーターの一覧|12" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2" ns="0" title="Moti" />
      <page pageid="6" ns="0" title="あずみ虫" />
      <page pageid="8" ns="0" title="かみわた" />
      <page pageid="9" ns="0" title="きゆづきさとこ" />
      <page pageid="10" ns="0" title="すまき俊悟" />
      <page pageid="11" ns="0" title="つたえゆず" />
      <page pageid="22" ns="0" title="スレイヤーズVSオーフェン" />
      <page pageid="145" ns="0" title="魔術士オーフェンはぐれ旅" />
      <page pageid="146" ns="0" title="魔術士オーフェンまわり道" />
      <page pageid="147" ns="0" title="魔術士オーフェン・無謀編" />
    </pages>
  </query>
</api>