feature #9665 [VarDumper] dd() helper method tip (snoek09, javiereguiluz)

This PR was merged into the master branch.

Discussion
----------

[VarDumper] dd() helper method tip

This fixes #9661.

Commits
-------

a82d95f Minor rewords
dd715fc dd() helper method tip

Author: wouterj

components/var_dumper.rst

@@ -82,6 +82,15 @@ current PHP SAPI:
     #. From time to time, run ``composer global update symfony/var-dumper``
        to have the latest bug fixes.
 
+.. tip::
+
+    The VarDumper component also includes a ``dd()`` helper method. This "dump
+    and die" feature calls ``dump()`` and stops the application immediately
+    after with ``exit()``.
+
+    .. versionadded:: 4.1
+        The ``dd()`` helper method was introduced in Symfony 4.1.
+
 DebugBundle and Twig Integration
 --------------------------------
 
@@ -93,8 +102,9 @@ of your application may just break it by e.g. sending HTTP headers or
 corrupting your view, the bundle configures the ``dump()`` function so that
 variables are dumped in the web debug toolbar.
 
-But if the toolbar cannot be displayed because you e.g. called ``die``/``exit``
-or a fatal error occurred, then dumps are written on the regular output.
+But if the toolbar cannot be displayed because you e.g. called
+``die()``/``exit()``/``dd()`` or a fatal error occurred, then dumps are written
+on the regular output.
 
 In a Twig template, two constructs are available for dumping a variable.
 Choosing between both is mostly a matter of personal taste, still: