Promise.prototype.finally [fixes #232]

README.md

@@ -51,20 +51,22 @@ bower install es6-promise --save
 
 ## Usage in IE<9
 
-`catch` is a reserved word in IE<9, meaning `promise.catch(func)` throws a syntax error. To work around this, you can use a string to access the property as shown in the following example.
+`catch` and `finally` are reserved keywords in IE<9, meaning
+`promise.catch(func)` or `promise.finally(func)` throw a syntax error. To work
+around this, you can use a string to access the property as shown in the
+following example.
 
-However, please remember that such technique is already provided by most common minifiers, making the resulting code safe for old browsers and production:
+However most minifiers will automatically fix this for you, making the
+resulting code safe for old browsers and production:
 
 ```js
 promise['catch'](function(err) {
   // ...
 });
 ```
 
-Or use `.then` instead:
-
 ```js
-promise.then(undefined, function(err) {
+promise['finally'](function() {
   // ...
 });
 ```