Merge branch '5.1' into 5.2

* 5.1:
  [Notifier] Add better example for Slack DSN
  Update events.rst
  A method call is reversed
  Update event_dispatcher.rst

Author: javiereguiluz

components/console/helpers/progressbar.rst

@@ -348,8 +348,8 @@ placeholder before displaying the progress bar::
     $progressBar->start();
     // 0/100 -- Start
 
-    $progressBar->advance();
     $progressBar->setMessage('Task is in progress...');
+    $progressBar->advance();    
     // 1/100 -- Task is in progress...
 
 Messages can be combined with custom placeholders too. In this example, the

doctrine/events.rst

@@ -16,7 +16,7 @@ on other common tasks (e.g. ``loadClassMetadata``, ``onClear``).
 
 There are different ways to listen to these Doctrine events:
 
-* **Lifecycle callbacks**, they are defined as methods on the entity classes and
+* **Lifecycle callbacks**, they are defined as public methods on the entity classes and
   they are called when the events are triggered;
 * **Lifecycle listeners and subscribers**, they are classes with callback
   methods for one or more events and they are called for all entities;
@@ -46,7 +46,7 @@ to learn everything about them.
 Doctrine Lifecycle Callbacks
 ----------------------------
 
-Lifecycle callbacks are defined as methods inside the entity you want to modify.
+Lifecycle callbacks are defined as public methods inside the entity you want to modify.
 For example, suppose you want to set a ``createdAt`` date column to the current
 date, but only when the entity is first persisted (i.e. inserted). To do so,
 define a callback for the ``prePersist`` Doctrine event:

event_dispatcher.rst

@@ -108,7 +108,7 @@ using a special "tag":
             $services = $configurator->services();
 
             $services->set(ExceptionListener::class)
-                ->addTag('kernel.event_listener', ['event' => 'kernel.exception'])
+                ->tag('kernel.event_listener', ['event' => 'kernel.exception'])
             ;
         };
 

notifier.rst

@@ -166,6 +166,8 @@ Chatters are configured using the ``chatter_transports`` setting:
 
     # .env
     SLACK_DSN=slack://default/ID
+    # If your slack webhook looks like "https://hooks.slack.com/services/XXXXXXXXX/XXXXXXXXX/XXXXXXXXXXXXXXXXXXXXXXXX" then use:
+    SLACK_DSN=slack://default/XXXXXXXXX/XXXXXXXXX/XXXXXXXXXXXXXXXXXXXXXXXX
 
 .. configuration-block::