Signed-off-by: wufengshan <wufengshan@huawei.com>

 Changes to be committed:

zh-cn/application-dev/database/database-mdds-guidelines.md

@@ -169,9 +169,9 @@ OpenHarmony系统中的分布式数据服务模块为开发者提供下面几种
            }
            try{
                kvStore.sync(deviceIds, distributedData.SyncMode.PUSH_ONLY, 1000);
-           }catch(e){
+           }catch (e) {
                 console.log("An unexpected error occurred. Error:" + e);
-            }
+           }
        }
    });
    ```