Merge pull request #1395 from caponica/master

Minor changes to make upgrade text more readable

UPGRADE-2.1.md

@@ -3,12 +3,12 @@ UPGRADE FROM 2.0 to 2.1
 
 ### Form
 
-  * Due to some refactoring in the Form Component, some types definition have been changed
-    and new ones have been introduces:
+  * Due to refactoring in the Form Component, some type definitions have been changed and 
+    new ones have been introduced:
 
-      * sonata_type_model : this type now only render a standard select widget or a list
-        widget (if multiple option is set)
+      * sonata_type_model : this type now only renders a standard select widget or a list
+        widget (if the ``multiple`` option is set)
 
       * sonata_type_model_list : this type replaces the option ``edit = list`` provided as
-        a 4th arguments on the ``sonata_type_model``
+        a 4th argument on the ``sonata_type_model``