Merge branch '5.0' into 5.1

* 5.0:
  Update information in flex about added files for twig

Author: javiereguiluz

quick_tour/flex_recipes.rst

@@ -61,8 +61,8 @@ What did this recipe do? In addition to automatically enabling the feature in
 ``config/packages/twig.yaml``
     A configuration file that sets up Twig with sensible defaults.
 
-``config/routes/dev/twig.yaml``
-    A route that helps you debug your error pages.
+``config/packages/test/twig.yaml``
+    A configuration file that changes some Twig options when running tests.
 
 ``templates/``
     This is the directory where template files will live. The recipe also added