title: How to print a special unicode character in a zsh script
body: <p>I am trying to print a special unicode character when two files are not different.
  My code below produces an error saying that "-e: command not found"</p>
  
  <pre><code>    if [ -n "`diff file1 file2`" ]
              then `echo -e "\u2713"`
      fi
  </code></pre>
  
  <p>Edit: I am using ZSH</p>