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>
    <reviewedpages rpstart="370" />
  </query-continue>
  <query>
    <reviewedpages>
      <p pageid="132" ns="0" title="Modularisation" revid="4456" stable_revid="4456" flagged_level="0" flagged_level_text="stable" />
      <p pageid="189" ns="0" title="stoney core: Resellers Resource - REST API" revid="3840" stable_revid="3840" flagged_level="0" flagged_level_text="stable" />
      <p pageid="202" ns="0" title="stoney cloud: Upgrade" revid="4676" stable_revid="4676" flagged_level="0" flagged_level_text="stable" />
      <p pageid="217" ns="0" title="stoney core: REST API (Technical Requirements and Implementation)" revid="3453" stable_revid="3453" flagged_level="0" flagged_level_text="stable" />
      <p pageid="218" ns="0" title="stoney core: Search Resource - REST API" revid="3831" stable_revid="3831" flagged_level="0" flagged_level_text="stable" />
      <p pageid="219" ns="0" title="stoney core: Authentication Resource - REST API" revid="3331" stable_revid="3331" flagged_level="0" flagged_level_text="stable" />
      <p pageid="254" ns="0" title="stoney core: People Resource - REST API" revid="4446" stable_revid="3822" flagged_level="0" flagged_level_text="stable" />
      <p pageid="259" ns="0" title="stoney core: Customers Resource - REST API" revid="3819" stable_revid="3819" flagged_level="0" flagged_level_text="stable" />
      <p pageid="303" ns="0" title="stoney core: REST API (Testing)" revid="3865" stable_revid="3865" flagged_level="0" flagged_level_text="stable" />
      <p pageid="368" ns="0" title="VM-Manager/Debugging" revid="4250" stable_revid="4250" flagged_level="0" flagged_level_text="stable" />
    </reviewedpages>
  </query>
</api>