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>
    <embeddedin eicontinue="10|Stub|1423" />
  </query-continue>
  <query>
    <embeddedin>
      <ei pageid="1381" ns="0" title="1084 Irish Ale" />
      <ei pageid="1407" ns="0" title="1762 Belgian Abbey II" />
      <ei pageid="1413" ns="0" title="3463 Forbidden Fruit" />
      <ei pageid="1414" ns="0" title="3522 Belgian Ardennes" />
      <ei pageid="1416" ns="0" title="3638 Bavarian Wheat" />
      <ei pageid="1418" ns="0" title="3711 French Saison" />
      <ei pageid="1419" ns="0" title="3724 Belgian Saison" />
      <ei pageid="1420" ns="0" title="3763 Roeselare Ale Blend" />
      <ei pageid="1421" ns="0" title="3787 Trappist High Gravity" />
      <ei pageid="1422" ns="0" title="3942 Belgian Wheat" />
    </embeddedin>
  </query>
</api>