Merge branch '7.1' into 7.2

* 7.1:
  [Doctrine] Delete the article about reverse engineering
  Update templates.rst: Adding installation command

Author: javiereguiluz

_build/redirection_map

@@ -571,3 +571,4 @@
 /testing/http_authentication /testing#testing_logging_in_users
 /doctrine/registration_form /security#security-make-registration-form
 /form/form_dependencies /form/create_custom_field_type
+/doctrine/reverse_engineering /doctrine#doctrine-adding-mapping

doctrine.rst

@@ -84,15 +84,15 @@ affect how Doctrine functions.
     There are many other Doctrine commands. Run ``php bin/console list doctrine``
     to see a full list.
 
+.. _doctrine-adding-mapping:
+
 Creating an Entity Class
 ------------------------
 
 Suppose you're building an application where products need to be displayed.
 Without even thinking about Doctrine or databases, you already know that
 you need a ``Product`` object to represent those products.
 
-.. _doctrine-adding-mapping:
-
 You can use the ``make:entity`` command to create this class and any fields you
 need. The command will ask you some questions - answer them like done below:
 
@@ -1107,7 +1107,6 @@ Learn more
     doctrine/dbal
     doctrine/multiple_entity_managers
     doctrine/resolve_target_entity
-    doctrine/reverse_engineering
     testing/database
 
 .. _`Doctrine`: https://www.doctrine-project.org/

doctrine/reverse_engineering.rst

@@ -6,6 +6,16 @@ whether you need to render HTML from a :doc:`controller </controller>` or genera
 the :doc:`contents of an email </mailer>`. Templates in Symfony are created with
 Twig: a flexible, fast, and secure template engine.
 
+Installation
+------------
+
+In applications using :ref:`Symfony Flex <symfony-flex>`, run the following command
+to install both Twig language support and its integration with Symfony applications:
+
+.. code-block:: terminal
+
+    $ composer require symfony/twig-bundle
+
 .. _twig-language:
 
 Twig Templating Language