diff --git a/container/gvar/gvar_z_example_test.go b/container/gvar/gvar_z_example_test.go
index 1b8ce6f09..2ec4c6704 100644
--- a/container/gvar/gvar_z_example_test.go
+++ b/container/gvar/gvar_z_example_test.go
@@ -3,6 +3,7 @@
 // This Source Code Form is subject to the terms of the MIT License.
 // If a copy of the MIT was not distributed with this file,
 // You can obtain one at https://github.com/gogf/gf.
+
 package gvar_test
 
 import (