[i2078] Add possibility to generate assert on @NonNull

test/transform/resource/after-ecj/NonNullOnParameterAbstract.java

@@ -5,7 +5,7 @@ abstract class NonNullOnParameterAbstract {
   public void test(@lombok.NonNull String arg) {
     if ((arg == null))
         {
-          throw new java.lang.NullPointerException("arg is marked @NonNull but is null");
+          throw new java.lang.NullPointerException("arg is marked non-null but is null");
         }
     System.out.println("Hey");
   }