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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.
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<?xml version="1.0"?>
<api>
  <query-continue>
    <allredirects garcontinue="Nitrification_in_Aquarium_3_(Report)" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2091" ns="0" title="BeerDeCoded" />
      <page pageid="2698" ns="0" title="General Assembly 2019-02-27" />
      <page pageid="2237" ns="0" title="Gorilla Warfare II" />
      <page pageid="2239" ns="0" title="Gorrila Warfare II" />
      <page pageid="1" ns="0" title="Hackuarium" />
      <page pageid="2115" ns="0" title="Nitrification in Aquarium 1 (Lab Journal)" />
      <page pageid="2112" ns="0" title="Nitrification in Aquarium 1 (Report)" />
      <page pageid="2116" ns="0" title="Nitrification in Aquarium 2 (Lab Journal)" />
      <page pageid="2113" ns="0" title="Nitrification in Aquarium 2 (Report)" />
      <page pageid="2117" ns="0" title="Nitrification in Aquarium 3 (Lab Journal)" />
    </pages>
  </query>
</api>