title: The newly generated .css by SASS now doesn't have comments to tell which file the css is from, what might be causing it?
body: <p>The old generated .css file has</p>
  
  <pre><code> /* line 27, ../../../app/stylesheets/partials/products/_summary_pane.sass */
  </code></pre>
  
  <p>which tells where the css (or sass) is originally from.  (example: the above say it is from _summary_pane.sass)</p>
  
  <p>and now all of a sudden, these lines are all gone.  What might be the cause for it?</p>