test commmit

Go_tutorial.md

@@ -80,6 +80,7 @@ There are three kinds of way to initialize variables:
 var v1 int = 10 // method 1
 var v2 = 10 // method 2
 v3 := 10 // method 3
+v4 := [3]int{1, 2, 3} //initialize a slice
 ```
 
 It can be observed that complier can deduce the data type automatically. However, when we use **method 3**, the variable should not be declared before, which will contibute to the error.