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>
    <alltransclusions>
      <t ns="10" title="Template:From 狟 understand boat feast extract" />
      <t ns="10" title="Template:Olympic boat smear was stamped 弝 boat have 岆 bamboo - Ling out boat ↓ N P" />
      <t ns="10" title="Template:SiCl rotten Xiang Jue together the boat 赻 planting Rao 棒煦 婒 decorated boat Yan Ming knelt down Chui 昹 boat knelt 赻 Kai Ying Xiang Yin Ji Li suspect dearie help her mad hair" />
      <t ns="10" title="Template:Themes.getDisplayThemes().length" />
      <t ns="10" title="Template:Xian bore &quot;Rui 珨 heap Peng Lai Zhang Teng Xing stamp Supplement Qi boat plant 拻 Xiang 珘" />
      <t ns="10" title="Template:蜲 唌 珘" />
    </alltransclusions>
  </query>
</api>