diff --git a/key/keycode_init.h b/key/keycode_init.h
index 3b3585b..0fa7779 100644
--- a/key/keycode_init.h
+++ b/key/keycode_init.h
@@ -138,7 +138,9 @@ CFStringRef createStringForKey(CGKeyCode keyCode)
 	CFDataRef layoutData =
 		(CFDataRef)TISGetInputSourceProperty(currentKeyboard,
 		                          kTISPropertyUnicodeKeyLayoutData);
+
 	if (layoutData == nil) { return 0; }
+
 	const UCKeyboardLayout *keyboardLayout =
 		(const UCKeyboardLayout *)CFDataGetBytePtr(layoutData);
 
diff --git a/test/main.go b/test/main.go
index 3245aae..eddca0a 100644
--- a/test/main.go
+++ b/test/main.go
@@ -16,6 +16,7 @@ func arobotgo() {
 	Println("color@@@", color)
 
 	robotgo.TypeString("Hello World")
+	// robotgo.KeyTap("a", "control")
 	robotgo.KeyTap("f1", "control")
 	// robotgo.KeyTap("enter")
 	// robotgo.KeyToggle("enter", "down")