tracks/go/exercises/luhn/example.go in trackler-2.0.6.10 vs tracks/go/exercises/luhn/example.go in trackler-2.0.6.11

@@ -1,8 +1,13 @@
 package luhn
 
+const testVersion = 1
+
 func Valid(n string) bool {
+	if len(n) == 1 {
+		return false
+	}
 	d := extract(n)
 	if len(d) == 0 {
 		return false
 	}
 	last := len(d) - 1
@@ -30,10 +35,6 @@
 	s := 0
 	for _, x := range d {
 		s += x
 	}
 	return s
-}
-
-func AddCheck(raw string) string {
-	return raw + string('0'+(10-check(extract(raw))%10)%10)
 }