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 arcontinue="n秒間隔でコマンドを繰り返し実行し続ける|307" />
  </query-continue>
  <query>
    <allredirects>
      <r fromid="44" ns="0" title="Genshi のバージョンアップ" />
      <r fromid="89" ns="0" title="MediaWikiでテーブル" />
      <r fromid="132" ns="0" title="MediaWikiのスパム対策" />
      <r fromid="209" ns="0" title="MySQLの文字列型" />
      <r fromid="381" ns="0" title="SVNリポジトリのバックアップ" />
      <r fromid="1546" ns="0" title="Tournament/doc" />
      <r fromid="58" ns="0" title="Yum-group" />
      <r fromid="170" ns="0" title="mailutilsのインストール" />
      <r fromid="73" ns="0" title="mod proxy" />
      <r fromid="1108" ns="0" title="mod proxyを後から追加する手順" />
    </allredirects>
  </query>
</api>