Acceptance test: fix display result 8

ibm/service/power/data_source_ibm_pi_image.go

@@ -21,7 +21,7 @@ func DataSourceIBMPIImage() *schema.Resource {
 		Schema: map[string]*schema.Schema{
 			// Arguments
 			Arg_CloudInstanceID: {
-				Description:  "The GUID of the service instance associated with an account .",
+				Description:  "The GUID of the service instance associated with an account  .",
 				Required:     true,
 				Type:         schema.TypeString,
 				ValidateFunc: validation.NoZeroValues,