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>
    <allimages gaicontinue="0157_Wood_Lathe_Setup_and_Tutorial.pdf" />
  </query-continue>
  <query>
    <pages>
      <page pageid="66" ns="6" title="File:!tgci01.jpg" />
      <page pageid="67" ns="6" title="File:!tgci02.jpg" />
      <page pageid="68" ns="6" title="File:!tgci03.jpg" />
      <page pageid="607" ns="6" title="File:0011 Router Setup for DaVinci.pdf" />
      <page pageid="308" ns="6" title="File:0043 C-Series Wiring Setup and ASCII Programming Manual.pdf" />
      <page pageid="296" ns="6" title="File:0049 DaVinci GCODE.pdf" />
      <page pageid="608" ns="6" title="File:0049 GCODE STEPPER DAVINCI.pdf" />
      <page pageid="320" ns="6" title="File:0060 Ball Nut-and-Screw Assembly Instructions.pdf" />
      <page pageid="297" ns="6" title="File:0061 Educational DaVinci Setup.pdf" />
      <page pageid="337" ns="6" title="File:0077 gantry 3 safety shield assem.pdf" />
    </pages>
  </query>
</api>