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="Console_Applications|660" />
  </query-continue>
  <query>
    <pages>
      <page pageid="57" ns="0" title="Lektion 1 (Csharp 2)" />
      <page pageid="65" ns="0" title="Installation och användning av Visual Studio" />
      <page pageid="82" ns="0" title="Windows Forms Applications" />
      <page pageid="329" ns="0" title="Övningar 6 (Csharp 2)" />
      <page pageid="506" ns="0" title="Övningar 14 (Csharp 2)" />
      <page pageid="555" ns="0" title="Övningar 15 (Csharp 2)" />
      <page pageid="568" ns="0" title="Övningar 16 (Csharp 2)" />
      <page pageid="611" ns="0" title="Övningar 17 (Csharp 2)" />
      <page pageid="618" ns="0" title="Övningar 18 (Csharp 2)" />
      <page pageid="644" ns="0" title="Övningar 19 (Csharp 2)" />
    </pages>
  </query>
</api>