!5693 示例代码修改

Merge pull request !5693 from 孙悦/OpenHarmony-3.1-Release

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

@@ -914,7 +914,7 @@ on(type:  'update', callback: () =>void ): void
 
   ```js
   var systemPasteboard = pasteboard.getSystemPasteboard();
-  var listener = ()=>{
+  var listener = () => {
       console.info('The system pasteboard has changed');
   };
   systemPasteboard.on('update', listener);
@@ -938,6 +938,9 @@ off(type:  'update', callback?: () =>void ): void
 **示例**
 
   ```js
+  let listener = () => {
+      console.info('The system pasteboard has changed');
+  };
   systemPasteboard.off('update', listener);
   ```
 

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

@@ -606,7 +606,7 @@ getPixelMap(wallpaperType: WallpaperType, callback: AsyncCallback<image.Pixel
 **示例：**
   
   ```js
-  wallpaper.getPixelMap(WALLPAPER_SYSTEM, function (err, data) {
+  wallpaper.getPixelMap(wallpaper.WallpaperType.WALLPAPER_SYSTEM, function (err, data) {
       console.info('wallpaperXTS ===> testGetPixelMapCallbackSystem err : ' + JSON.stringify(err));
       console.info('wallpaperXTS ===> testGetPixelMapCallbackSystem data : ' + JSON.stringify(data));
   });