title: grep command to add end line after every match
body: <p>do you have any idea how to add some end line like</p>
  
  <pre><code>"=========================================================================================="
  </code></pre>
  
  <p>after every match</p>
  
  <pre><code>tail -f error.log -n 2000 | grep -B 10 -A 25 'Exception:'
  </code></pre>
  
  <p>this command prints all Exceptions log but i likes to see one seperator line for each exception log.</p>