modify

Signed-off-by: NLVB8189 <lvbai1@huawei.com>

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

@@ -5,9 +5,9 @@
 > **说明：**
 >
 > 本模块首批接口从API version 10开始支持。后续版本的新增接口，采用上角标单独标记接口的起始版本。
-> 
+>
 > 本模块接口仅可在FA模型下使用。
-> 
+>
 > 本模块接口均为系统接口。
 
 ## 导入模块
@@ -34,10 +34,11 @@ onCreate(want: object): void
 
 ```js
 import WallpaperExtensionAbility from '@ohos.WallpaperExtensionAbility';
+
 class WallpaperExt extends WallpaperExtensionAbility {
-  onCreate(want) {
-    console.log('onCreate, want:' + want.abilityName);
-  }
+    onCreate(want) {
+        console.log('onCreate, want:' + want.abilityName);
+    }
 }
 ```
 
@@ -59,10 +60,11 @@ onWallpaperChange(wallpaperType: number): void
 
 ```js
 import WallpaperExtensionAbility from '@ohos.WallpaperExtensionAbility';
+
 class WallpaperExt extends WallpaperExtensionAbility {
-  onWallpaperChange(wallpaperType) {
-    console.log('onWallpaperChange, wallpaperType:' + wallpaperType);
-  }
+    onWallpaperChange(wallpaperType) {
+        console.log('onWallpaperChange, wallpaperType:' + wallpaperType);
+    }
 }
 ```
 
@@ -78,9 +80,10 @@ onDestroy(): void
 
 ```js
 import WallpaperExtensionAbility from '@ohos.WallpaperExtensionAbility';
+
 class WallpaperExt extends WallpaperExtensionAbility {
-  onDestroy() {
-    console.log('onDestroy');
-  }
+    onDestroy() {
+        console.log('onDestroy');
+    }
 }
 ```