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="Transmitting_DVB-S_with_USRP_and_VLC" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Easycap DC60" missing="" />
      <page pageid="53" ns="0" title="Gnuradio" />
      <page pageid="3" ns="0" title="SDR Frontends" />
      <page pageid="68" ns="0" title="KAIRA" />
      <page pageid="4" ns="0" title="Installing Gnuradio on Ubuntu" />
      <page pageid="104" ns="0" title="Cryptography" />
      <page pageid="67" ns="0" title="Radar" />
      <page pageid="61" ns="0" title="Distributed RF Scanner Array" />
      <page pageid="6" ns="0" title="Repeaters" />
      <page pageid="106" ns="0" title="Installing Gnu Radio on Ubuntu" />
    </pages>
  </query>
</api>