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="Characteristic_property_of_the_quotient_topology" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Canonical projection" missing="" />
      <page pageid="498" ns="0" title="Basis for a topology" />
      <page pageid="4" ns="0" title="Bijection" />
      <page pageid="5103" ns="0" title="Borv" />
      <page pageid="788" ns="0" title="Bounded linear map" />
      <page pageid="840" ns="0" title="Bounded sequence" />
      <page pageid="414" ns="0" title="Bounded set" />
      <page pageid="355" ns="0" title="Canonical linear map" />
      <page pageid="1463" ns="0" title="Canonical projection of an equivalence relation" />
      <page pageid="1392" ns="0" title="Canonical projections of the product topology" />
    </pages>
  </query>
</api>