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>
    <allfileusages afcontinue="CVAGO_reunioes_01.png|43" />
  </query-continue>
  <query>
    <allfileusages>
      <f fromid="80" ns="6" title="Arquivo:BMW Logo.jpg" />
      <f fromid="107" ns="6" title="Arquivo:BMW Logo.jpg" />
      <f fromid="133" ns="6" title="Arquivo:BMW Logo.jpg" />
      <f fromid="56" ns="6" title="Arquivo:B car alfabeto.jpg" />
      <f fromid="174" ns="6" title="Arquivo:B car alfabeto.jpg" />
      <f fromid="1" ns="6" title="Arquivo:Banner interclubes cvago2019 3.png" />
      <f fromid="58" ns="6" title="Arquivo:Banner interclubes cvago2019 3.png" />
      <f fromid="452" ns="6" title="Arquivo:Banner interclubes cvago2019 3.png" />
      <f fromid="273" ns="6" title="Arquivo:CRV veiculos.png" />
      <f fromid="76" ns="6" title="Arquivo:CVAGO documentos historicos.jpg" />
    </allfileusages>
  </query>
</api>