title: How to print list with " { list } " brackets
body: <p>I'm trying to print a <code>list</code> with <code>{}</code> curly braces.
  For example:</p>
  
  <pre><code>the_list = [1, 2, 3]
  </code></pre>
  
  <p>and I want to print the list as </p>
  
  <pre><code>{1, 2, 3}
  </code></pre>
  
  <p>How can I do that?
  Thanks!</p>