Minor reword

Author: javiereguiluz

notifier.rst

@@ -273,19 +273,19 @@ Service                                  Package                               D
 
 .. caution::
 
-    If you have the messenger component installed, the default component
-    configuration implies sending notifications through the MessageBus.
-    If you don't have a message consumer running, messages will never be sent.
-    To send messages directly via the transport, add the following line to the configuration.
+    By default, if you have the :doc:`Messenger component </messenger>` installed,
+    the notifications will be sent through the MessageBus. If you don't have a
+    message consumer running, messages will never be sent.
 
-    .. configuration-block::
+    To change this behavior, add the following configuration to send messages
+    directly via the transport:
 
-        .. code-block:: yaml
+    .. code-block:: yaml
 
-            # config/packages/notifier.yaml
-            framework:
-                notifier:
-                    message_bus: false
+        # config/packages/notifier.yaml
+        framework:
+            notifier:
+                message_bus: false
 
 Chatters are configured using the ``chatter_transports`` setting: