diff --git a/docs/tutorial.md b/docs/tutorial.md
index 476f175..6c8afee 100644
--- a/docs/tutorial.md
+++ b/docs/tutorial.md
@@ -155,8 +155,9 @@ Logical operation could be used the same
 : comparison are based on comparison operator which can be overloaded
 
 (2)
-: referential equality means left and right operands references exactly same instance of some object. Note that all singleton object, like `null`, are referentially equal too, while string different literals even being equal are most likely referentially not equal:
+: referential equality means left and right operands references exactly same instance of some object. Note that all singleton object, like `null`, are referentially equal too, while string different literals even being equal are most likely referentially not equal
 
+Reference quality and object equality example:
 
     assert( null == null)  // singletons
     assert( null === null)