title: How do I highlight CVS changes in Emacs?
body: <p>I'm using emacs with cvs and have cvs mode enabled.   I'd like to get line-by-line highlighting of changes from the latest version in CVS.   I've seen this done in intellij where there is a green indication for lines added and another indication for lines modified and a third symbol for lines deleted.</p>
  
  <p>Is there a cvs highlighting mode for emacs to show changes from the latest version of cvs?  I'm not looking for a <code>cvs diff</code> type functionality that would open in a new buffer, but something that would indicate in my current buffer what lines have been modified.</p>
  
  <p>In the following image there is a blue rectangle on the left side in what Intellij calls the "gutter" to indicate that the code is different than what is in source control.   </p>
  
  <p><a href="https://i.stack.imgur.com/0LG7q.gif" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/0LG7q.gif" alt="intellij example"></a><br>
  <sub>(source: <a href="http://www.jetbrains.com/idea/features/screenshots/60/actions.gif" rel="nofollow noreferrer">jetbrains.com</a>)</sub>  </p>
  
  <p>I'm looking for similar functionality in emacs.</p>