title: How to separate bash prompt + command from output with a blank line?
body: <p>In bash, I would like to separate the prompt + command from the command output with a single empty line.</p>
  
  <p>In addition, I would also like the output to also be followed by a single blank line.</p>
  
  <p>For instance, instead of this:</p>
  
  <pre><code>$ ls
    file1  file2  file3
    file4  file5  file6
  $ 
  </code></pre>
  
  <p>I would like to see this:</p>
  
  <pre><code>$ ls
                             &lt;--- empty line
    file1  file2  file3
    file4  file5  file6
                             &lt;--- empty line
  $ 
  </code></pre>
  
  <p>Ideally, no line (or just one line) would be skipped if output is empty.</p>