Added a needed blank line

javiereguiluz · web-flow · commit ad7afe042978 · 2016-12-19T11:40:30.000+01:00
diff --git a/UPGRADE-3.3.md b/UPGRADE-3.3.md
@@ -9,6 +9,7 @@ ClassLoader
 
 DependencyInjection
 -------------------
+
  * Using the `PhpDumper` with an uncompiled `ContainerBuilder` is deprecated and
    will not be supported anymore in 4.0.
 
