title: Getting output of command '&'
body: <pre><code>res=$(grunt qunit) &amp; spinner
  echo "$res"
  </code></pre>
  
  <p><code>spinner</code> is a function that does spinning animation.</p>
  
  <p>Now I am not getting the output in <code>echo</code>.</p>
  
  <p>If I remove <code>&amp; spinner</code>, then it works perfectly.</p>