update api

Signed-off-by: Nzhangxingxia <zhangxingxia1@huawei.com>

zh-cn/application-dev/reference/apis/js-apis-fileio.md

@@ -1432,7 +1432,7 @@ lstat(path:string, callback:AsyncCallback<Stat>): void
   ```js
   fileio.lstat(path, function (err, stat) {
       // do something
-  ));
+  });
   ```
 
 
@@ -1827,7 +1827,7 @@ chown(path: string, uid: number, gid: number): Promise<void>
 - 示例：
   ```js
   let stat = fileio.statSync(path);
-  fileio.chown(path, stat.uid, stat.gid)).then(function(){
+  fileio.chown(path, stat.uid, stat.gid).then(function(){
       console.info("chown successfully");
   }).catch(function(err){
       console.info("chown failed with error:"+ err);
@@ -2127,7 +2127,7 @@ fdopenStream(fd: number, mode: string): Promise<Stream>
 - 示例：
   ```js
   fileio.fdopenStream(fd, mode).then(function(stream){
-      console.info("openStream successfully"+);
+      console.info("openStream successfully");
   }).catch(function(err){
       console.info("openStream failed with error:"+ err);
   });