title: Download png with curl not readable
body: <p>I want to download the following PNG file:</p>
  
  <p><a href="https://spartacus-idh.com/liseuse/978-2-36693-030-6/lect/ImGp6.png" rel="nofollow noreferrer">https://spartacus-idh.com/liseuse/978-2-36693-030-6/lect/ImGp6.png</a></p>
  
  <p>However, when I type:</p>
  
  <pre><code> curl -O https://spartacus-idh.com/liseuse/978-2-36693-030-6/lect/ImGp6.png
  </code></pre>
  
  <p>The resulting file can not be opened. </p>
  
  <p>Can someone explain to me why this does not work?</p>