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="Add_grant_SQLServerAgent_01.png" />
  </query-continue>
  <query>
    <pages>
      <page pageid="959" ns="6" title="File:01 eWeLink Camera.png" />
      <page pageid="960" ns="6" title="File:02 eWeLink Camera.png" />
      <page pageid="507" ns="6" title="File:Acer OpticalDrive.jpg" />
      <page pageid="508" ns="6" title="File:Acer OpticalDrive measure.jpg" />
      <page pageid="761" ns="6" title="File:Active-directory-oauth-code-flow-native-app.png" />
      <page pageid="1043" ns="6" title="File:Add bluetooth 00.png" />
      <page pageid="1044" ns="6" title="File:Add bluetooth 01.png" />
      <page pageid="1045" ns="6" title="File:Add bluetooth 02.png" />
      <page pageid="1046" ns="6" title="File:Add bluetooth 03.png" />
      <page pageid="1047" ns="6" title="File:Add bluetooth 04.png" />
    </pages>
  </query>
</api>