test sign

go.mod

@@ -6,6 +6,5 @@ require github.com/stretchr/testify v1.7.0
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
 )

unpack.go

@@ -8,5 +8,6 @@ var ErrInvalidString = errors.New("invalid string")
 
 func Unpack(_ string) (string, error) {
 	// Place your code here.
+	// test
 	return "", nil
 }