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="IRidium_Script_DDK|575" />
  </query-continue>
  <query>
    <pages>
      <page pageid="576" ns="0" title="IRidiumScript Developer&#039;s Guide" />
      <page pageid="579" ns="0" title="IRidium Script DDK" />
      <page pageid="905" ns="0" title="AV &amp; Custom Systems: Control via IR channels" />
      <page pageid="994" ns="0" title="HWID, UDID, Serial Number" />
      <page pageid="1072" ns="0" title="FAQ" />
      <page pageid="1270" ns="0" title="I2 Control for Android" />
      <page pageid="1271" ns="0" title="I2 Control for Windows" />
      <page pageid="1272" ns="0" title="I2 Control for Apple iOS" />
      <page pageid="1273" ns="0" title="I2 Control for Mac" />
      <page pageid="1274" ns="0" title="I2 Control V.2.2 for Mac" />
    </pages>
  </query>
</api>