Fix code specification issues

Signed-off-by: Nyuyaozhi <yuyaozhi@huawei.com>

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

@@ -16,17 +16,17 @@ import ElementName from '@ohos.bundle';
 import image from '@ohos.multimedia.image';
 import missionManager from '@ohos.application.missionManager';
 
-  missionManager.getMissionInfos("", 10, (error, missions) => {
-    console.log("getMissionInfos is called, error.code = " + error.code);
-    console.log("size = " + missions.length);
-    console.log("missions = " + JSON.stringify(missions));
-    var id = missions[0].missionId;
-
-    missionManager.getMissionSnapShot("", id, (error, snapshot) => {
-  	console.log("getMissionSnapShot is called, error.code = " + error.code);
-  	console.log("bundleName = " + snapshot.ability.bundleName);
-  })
+missionManager.getMissionInfos("", 10, (error, missions) => {
+  console.log("getMissionInfos is called, error.code = " + error.code);
+  console.log("size = " + missions.length);
+  console.log("missions = " + JSON.stringify(missions));
+  var id = missions[0].missionId;
+
+  missionManager.getMissionSnapShot("", id, (error, snapshot) => {
+    console.log("getMissionSnapShot is called, error.code = " + error.code);
+    console.log("bundleName = " + snapshot.ability.bundleName);
   })
+})
 ```
 ## MissionSnapshot
 

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

@@ -52,7 +52,7 @@ onAcceptWant(want: Want): string;
 
   | 类型 | 说明 | 
   | -------- | -------- |
-  | string | 用户返回一个ability标识，如果之前启动过次标识的ability，不创建新的实例并拉回栈顶，否则创建新的实例并启动。 | 
+  | string | 用户返回一个ability标识，如果之前启动过标识的ability，不创建新的实例并拉回栈顶，否则创建新的实例并启动。 | 
 
 **示例：**