Merge pull request #6805 from yesdevnull/patch-1

[Docs] Corrected NamingStrategy demo code to match example

docs/en/reference/namingstrategy.rst

@@ -97,7 +97,7 @@ a naming strategy for database tables and columns.
 Implementing a naming strategy
 -------------------------------
 If you have database naming standards, like all table names should be prefixed
-by the application prefix, all column names should be upper case, you can easily
+by the application prefix, all column names should be lower case, you can easily
 achieve such standards by implementing a naming strategy.
 
 You need to create a class which implements ``Doctrine\ORM\Mapping\NamingStrategy``.