Update main.rs

src/main.rs

@@ -121,7 +121,7 @@ mod tests {
 
     #[test]
     fn test_persistance() {
-        assert_eq!(BigUint::from(0u8).per_mul(), 0);
+        assert_eq!(BigUint::from(0u8).per_mul(), 1);
         assert_eq!(BigUint::from(10u8).per_mul(), 1);
         assert_eq!(BigUint::from(25u8).per_mul(), 2);
         assert_eq!(BigUint::from(39u8).per_mul(), 3);