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="Basic_structure|3182" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1922" ns="0" title="SiWaWa.Software" />
      <page pageid="1923" ns="0" title="WIS.2.Software" />
      <page pageid="1924" ns="0" title="Test20130211.Software" />
      <page pageid="1927" ns="0" title="DSD.Software" />
      <page pageid="1932" ns="0" title="MyTestDSS.Software" />
      <page pageid="3029" ns="0" title="TestDSS.Software" />
      <page pageid="3161" ns="0" title="Multiple DSS are often needed to meet complex needs" />
      <page pageid="3168" ns="0" title="Adapting the software to make it possible to easily include also the output of other mechanistic" />
      <page pageid="3171" ns="0" title="The fact that ProgettoBosco is conceived according to the criteria and indicators of sustainable" />
    </pages>
  </query>
</api>