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>
    <allpages gapcontinue="Windows_10_で_BlueToothのアイコンを通知領域に表示するには" />
  </query-continue>
  <query>
    <pages>
      <page pageid="293" ns="0" title="TableViewでセルのアライメントを指定するには" contentmodel="wikitext" pagelanguage="ja" touched="2016-11-09T12:49:54Z" lastrevid="3390" counter="7636" length="938" />
      <page pageid="448" ns="0" title="Tkinter Tips" contentmodel="wikitext" pagelanguage="ja" touched="2018-08-27T12:16:15Z" lastrevid="4382" counter="14384" length="417" />
      <page pageid="220" ns="0" title="Up Navigation を実装するには" contentmodel="wikitext" pagelanguage="ja" touched="2016-11-09T11:18:02Z" lastrevid="2349" counter="8665" length="2256" />
      <page pageid="126" ns="0" title="Viewの意味" contentmodel="wikitext" pagelanguage="ja" touched="2015-08-20T10:15:03Z" lastrevid="1417" counter="29995" length="1831" />
    </pages>
  </query>
</api>