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>
    <alllinks galcontinue="Building_with_AOSP" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="BD7885" missing="" />
      <page ns="0" title="BP Loader" missing="" />
      <page ns="0" title="Boot chain" missing="" />
      <page ns="0" title="Bootloader mode" missing="" />
      <page pageid="109" ns="0" title="Broadcomm BCM4750" />
      <page pageid="222" ns="0" title="BootRecoverySignature" />
      <page pageid="22" ns="0" title="BP firmware" />
      <page pageid="21" ns="0" title="Baseband Processor Boot ROM" />
      <page pageid="7" ns="0" title="Booting chain" />
      <page pageid="352" ns="0" title="Broadcom BCM4325" />
    </pages>
  </query>
</api>