Refactored error output & exit

z/root.go

@@ -23,8 +23,8 @@ var rootCmd = &cobra.Command{
 
 func Execute() {
   if err := rootCmd.Execute(); err != nil {
-    fmt.Println(err)
-    os.Exit(1)
+    fmt.Printf("△ %+v\n", err)
+    os.Exit(-1)
   }
 }