Merge branch '6.3' into 6.4

* 6.3:
  Fix translator cache_dir default value reference

Author: OskarStark

reference/configuration/framework.rst

@@ -2529,7 +2529,7 @@ translator
 cache_dir
 .........
 
-**type**: ``string`` | ``null`` **default**: ``%kernel.cache_dir%/translations/``
+**type**: ``string`` | ``null`` **default**: ``%kernel.cache_dir%/translations``
 
 Defines the directory where the translation cache is stored. Use ``null`` to
 disable this cache.