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"?>
    <revisions rvcontinue="1779" />
      <page pageid="1" ns="0" title="Main Page">
          <rev user="Grandpa Ruh" timestamp="2006-05-01T19:43:38Z" comment="/* Read the Wealth of Networks */  added  Table Of Contents, Acknowledgments., Par One" />
          <rev user="Grandpa Ruh" timestamp="2006-05-02T20:00:58Z" comment="added Chapter 9 &amp; Chapter titles; ideas ... to Growing this Wiki; John Stuart Mill" />
          <rev user="Grandpa Ruh" timestamp="2006-05-02T20:02:34Z" comment="Table Of Contents to Table of Contents" />
          <rev user="Won" timestamp="2006-05-04T16:17:47Z" comment="" />
          <rev user="Won" timestamp="2006-05-04T16:25:55Z" comment="" />