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weaverryan · weaverryan · commit 31afb0e2429f · 2016-08-01T20:39:24.000-04:00
diff --git a/validation/custom_constraint.rst b/validation/custom_constraint.rst
@@ -199,6 +199,7 @@ Now, when Symfony looks for the ``ContainsAlphanumericValidator`` validator, it
 load this service from the container.
 
 .. note::
+
     In earlier versions of Symfony, the tag required an ``alias`` key (usually set
     to the class name). This is still allowed your constraint's ``validateBy``
     method can return this alias (instead of a class name).
