add note about not passing the command argument with Symfony 2.4

Author: xabbuh

cookbook/console/console_command.rst

@@ -159,7 +159,6 @@ instead of
             $commandTester = new CommandTester($command);
             $commandTester->execute(
                 array(
-                    'command' => $command->getName(),
                     'name'    => 'Fabien',
                     '--yell'  => true,
                 )
@@ -171,6 +170,11 @@ instead of
         }
     }
 
+.. versionadded:: 2.4
+    Since Symfony 2.4, the ``CommandTester`` automatically detects the name of
+    the command to execute. Thus, you don't need to pass it via the ``command``
+    argument anymore.
+
 .. note::
 
     In the specific case above, the ``name`` parameter and the ``--yell`` option
@@ -200,7 +204,6 @@ you can extend your test from
             $commandTester = new CommandTester($command);
             $commandTester->execute(
                 array(
-                    'command' => $command->getName(),
                     'name'    => 'Fabien',
                     '--yell'  => true,
                 )