Merge branch 'gh-pages' of github.com:ruanyf/es6tutorial into gh-pages

docs/array.md

@@ -74,7 +74,7 @@ function foo() {
 
 ```javascript
 Array.from({ length: 3 });
-// [ undefined, undefined, undefinded ]
+// [ undefined, undefined, undefined ]
 ```
 
 上面代码中，`Array.from`返回了一个具有三个成员的数组，每个位置的值都是`undefined`。扩展运算符转换不了这个对象。

docs/async.md

@@ -574,7 +574,7 @@ var fs = require('fs');
 var readFile = function (fileName){
   return new Promise(function (resolve, reject){
     fs.readFile(fileName, function(error, data){
-      if (error) reject(error);
+      if (error) return reject(error);
       resolve(data);
     });
   });

docs/destructuring.md

@@ -514,7 +514,7 @@ var [(a)] = [1];
 var {x: (c)} = {};
 var ({x: c}) = {};
 var {(x: c)} = {};
-var {(x): c} = {};}
+var {(x): c} = {};
 
 var { o: ({ p: p }) } = { o: { p: 2 } };
 ```