add comments to example in README.

leebyron · leebyron · commit d6086b32202f · 2015-02-24T20:03:15.000-05:00
Closes immutable-js#345
diff --git a/README.md b/README.md
@@ -123,9 +123,9 @@ has changed.
 ```javascript
 var map1 = Immutable.Map({a:1, b:2, c:3});
 var map2 = map1.set('b', 2);
-assert(map1 === map2);
+assert(map1 === map2); // no change
 var map3 = map1.set('b', 50);
-assert(map1 !== map3);
+assert(map1 !== map3); // change
 ```
 
 If an object is immutable, it can be "copied" simply by making another reference
