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>
    <allfileusages gafcontinue="Drill_bank_display.gif|373" />
  </query-continue>
  <query>
    <pages>
      <page pageid="55" ns="0" title="Controller box" />
      <page pageid="72" ns="0" title="Preprocessor" />
      <page pageid="262" ns="0" title="FAQ" />
      <page pageid="265" ns="0" title="HSD Spindle" />
      <page pageid="300" ns="0" title="Stepper DaVinci" />
      <page pageid="434" ns="0" title="Backlash" />
      <page pageid="437" ns="0" title="Computer speed issue" />
      <page pageid="465" ns="0" title="Finding your spindle" />
      <page pageid="518" ns="0" title="Belt Tightness" />
      <page pageid="525" ns="0" title="Test the toolchanger sensors" />
    </pages>
  </query>
</api>