Update 3. Demonstrate ability to customize request routing.md

Author: simpleadm

2. Request Flow Processing/3. Demonstrate ability to customize request routing.md

@@ -52,6 +52,6 @@ reference route by ID and add own module "before" original module.
 
 1. If all routers didn't match, default controller provides two opportunities:
   - set default 404 route in admin config `web/default/no_route` (see: [\Magento\Framework\App\Router\NoRouteHandler::process](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/App/Router/NoRouteHandler.php#L34))
-  - register custom handler in [noRouteHandlerList](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/App/Router/NoRouteHandlerList.php)
+  - register custom handler in [noRouteHandlerList](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/App/Router/NoRouteHandlerList.php):
     * backend (sortOrder: 10) [Magento\Backend\App\Router\NoRouteHandler](https://github.com/magento/magento2/blob/2.2-develop/app/code/Magento/Backend/App/Router/NoRouteHandler.php#L44) -> `adminhtml/noroute/index`
-    * default (sortOrder: 100) [Magento\Framework\App\Router\NoRouteHandler]((https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/App/Router/NoRouteHandler.php)
+    * default (sortOrder: 100) [Magento\Framework\App\Router\NoRouteHandler](https://github.com/magento/magento2/blob/2.2-develop/lib/internal/Magento/Framework/App/Router/NoRouteHandler.php)