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="彦山権現誓助剣" />
  </query-continue>
  <query>
    <pages>
      <page pageid="98982" ns="0" title="Chōken" />
      <page pageid="94160" ns="0" title="Kōken" />
      <page pageid="98994" ns="0" title="Suō" />
      <page pageid="98883" ns="0" title="Test 4" />
      <page pageid="98874" ns="0" title="Ōdōgu" />
      <page pageid="98880" ns="0" title="Ōkuchi" />
      <page pageid="99008" ns="0" title="Ōsode" />
      <page pageid="98863" ns="0" title="伊勢参宮名所図会" />
      <page pageid="337" ns="0" title="保留2" />
      <page pageid="98875" ns="0" title="助六所縁江戸桜" />
    </pages>
  </query>
</api>