Update README.md

JonathanHayward · JonathanHayward · commit 6274e6a9c0ec · 2015-02-13T14:14:27.000-06:00
Changed discrepancy where map2 had b set to 20 but a comment that b was equal to 50.
diff --git a/README.md b/README.md
@@ -90,7 +90,7 @@ of your file.
 import Immutable = require('immutable');
 var map1: Immutable.Map<string, number>;
 map1 = Immutable.Map({a:1, b:2, c:3});
-var map2 = map1.set('b', 20);
+var map2 = map1.set('b', 50);
 map1.get('b'); // 2
 map2.get('b'); // 50
 ```
