Split 'Format code' into 'Code style linting' with existing extention and 'Format code' with PHP CS Fixer extension. Added demo png for former and demo gif for latter.

README.md

@@ -40,9 +40,16 @@ I recommend to disable VS Code's built-in PHP IntelliSense by setting `php.sugge
 ### Column-accurate error reporting
 ![Error reporting demo](images/publishDiagnostics.png)
 
-### Format code
+### Code style linting
 Please use a dedicated extension like [PHP CodeSniffer](https://marketplace.visualstudio.com/items?itemName=ikappas.phpcs).
 
+[Code style linting demo](images/phpcs.png)
+
+### Format code
+Please use a dedicated extension like [PHP CS Fixer](https://marketplace.visualstudio.com/items?itemName=junstyle.php-cs-fixer).
+
+[Format code demo](images/phpcsfixer.gif)
+
 
 ## Todo
  - Rename