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HTML is good for debugging, but is unsuitable for application use.
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To see the non HTML representation of the XML format, set format=xml.
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<?xml version="1.0"?>
<api>
  <query-continue>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20151012225852" timestamp="2015-10-12T22:58:52Z" ns="0" title="BLIK" />
        <page value="20151013101959" timestamp="2015-10-13T10:19:59Z" ns="0" title="CA-VA.club" />
        <page value="20151013102908" timestamp="2015-10-13T10:29:08Z" ns="0" title="Contributions publiques" />
        <page value="20151013102924" timestamp="2015-10-13T10:29:24Z" ns="0" title="Contributions internes" />
        <page value="20151014220246" timestamp="2015-10-14T22:02:46Z" ns="0" title="Livre de Bord" />
        <page value="20151016074322" timestamp="2015-10-16T07:43:22Z" ns="0" title="Documentation" />
        <page value="20151114061822" timestamp="2015-11-14T06:18:22Z" ns="0" title="Main Page" />
        <page value="20200517124704" timestamp="2020-05-17T12:47:04Z" ns="0" title="Liste de diffusion interne" />
        <page value="20200517154302" timestamp="2020-05-17T15:43:02Z" ns="0" title="Anciens textes de ce blik" />
        <page value="20200517170423" timestamp="2020-05-17T17:04:23Z" ns="0" title="-" />
      </results>
    </querypage>
  </query>
</api>