From 4759c7c19314ad6989655deaf3f343c1c41d76c7 Mon Sep 17 00:00:00 2001
From: zhongsp <patrick.zhongsp@gmail.com>
Date: Wed, 3 Jul 2019 07:12:46 +0800
Subject: [PATCH] [doc] typo in Declaration Merging. PR1043

---
 doc/handbook/Declaration Merging.md | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/doc/handbook/Declaration Merging.md b/doc/handbook/Declaration Merging.md
index 77ef5e3..27da54e 100644
--- a/doc/handbook/Declaration Merging.md	
+++ b/doc/handbook/Declaration Merging.md	
@@ -247,13 +247,13 @@ TypeScript并非允许所有的合并。
 
 虽然JavaScript不支持合并，但你可以为导入的对象打补丁以更新它们。让我们考察一下这个玩具性的示例：
 
-```js
-// observable.js
+```ts
+// observable.ts
 export class Observable<T> {
     // ... implementation left as an exercise for the reader ...
 }
 
-// map.js
+// map.ts
 import { Observable } from "./observable";
 Observable.prototype.map = function (f) {
     // ... another exercise for the reader