Update readme

Author: gregjacobs

README.md

@@ -6,6 +6,16 @@
 [![codecov](https://codecov.io/github/gregjacobs/Autolinker.js/graph/badge.svg?token=6sqLqa2oeb)](https://codecov.io/github/gregjacobs/Autolinker.js)
 [![GitHub License](https://img.shields.io/github/license/gregjacobs/Autolinker.js)](https://github.com/gregjacobs/Autolinker.js/blob/master/LICENSE)
 
+```
+"Visit google.com" 
+         
+          |
+          |
+          v
+
+"Visit <a href="https://google.com">google.com</a>"
+```
+
 Because I had so much trouble finding a good auto-linking implementation out in
 the wild, I decided to roll my own. It seemed that everything I found out there
 was either an implementation that didn't cover every case, or was just limited