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="Barbapapa_by_Annette_Tison_and_Talus_Taylor|19864" />
  </query-continue>
  <query>
    <pages>
      <page pageid="4438" ns="0" title="Badger on the Barge" />
      <page pageid="4550" ns="0" title="Baby Brains and RoboMum" />
      <page pageid="4551" ns="0" title="Baggy Brown" />
      <page pageid="4552" ns="0" title="Banana" />
      <page pageid="4868" ns="0" title="Bad Traffic" />
      <page pageid="5388" ns="0" title="Bad science" />
      <page pageid="14004" ns="0" title="Ballad by Julie Stiefvater" />
      <page pageid="14681" ns="0" title="Babar&#039;s Celesteville Games by Lawrence de Brunhoff" />
      <page pageid="18867" ns="0" title="Babies, Babies, Babies! by Catherine and Laurence Anholt" />
      <page pageid="21222" ns="0" title="Barbapapas New House by Annette Tison and Talus Taylor" />
    </pages>
  </query>
</api>