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="Botania|47" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2" ns="0" title="Aura Cascade" />
      <page pageid="25" ns="0" title="ModTweaker" />
      <page pageid="29" ns="0" title="ModTweaker:Applied Energistics 2 Support" />
      <page pageid="34" ns="0" title="ModTweaker:Botania Support" />
      <page pageid="35" ns="0" title="ModTweaker:Botania Support:Lexica Botania" />
      <page pageid="37" ns="0" title="ModTweaker:Chisel 2 Support" />
      <page pageid="42" ns="0" title="ModTweaker:Ex Nihilo Support" />
      <page pageid="43" ns="0" title="ModTweaker:Extended Crafting Support" />
      <page pageid="44" ns="0" title="ModTweaker:Extra Utilities Support" />
      <page pageid="46" ns="0" title="ModTweaker:Factorization Support" />
    </pages>
  </query>
</api>