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To see the non HTML representation of the XML format, set format=xml.
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<?xml version="1.0"?>
<api>
<query>
<pages>
<page pageid="17" ns="0" title="IJoomla Installer Installation" />
<page pageid="449" ns="0" title="Migrations, Upgrades and Compatibilities" />
<page pageid="153" ns="0" title="Poll" />
<page pageid="38" ns="0" title="Setting Up Cron Job" />
<page pageid="33" ns="0" title="Traditional Installation" />
<page pageid="43" ns="0" title="Update With Patch Files" />
</pages>
</query>
</api>