code syntaxe fixing

Author: triuyen

src/number_theory/euler_totient.rs

@@ -74,9 +74,7 @@ mod tests {
             assert_eq!(
                 euler_totient(input),
                 expected,
-                "φ({}) should be {}",
-                input,
-                expected
+                "φ({input}) should be {expected}"
             );
         }
     }
@@ -99,10 +97,10 @@ mod tests {
 
     #[test]
     fn test_prime_property() {
-        // For any prime p, φ(p) = p - 1
-        let primes = vec![2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31];
-        for p in primes {
-            assert_eq!(euler_totient(p), p - 1, "φ({}) should be {}", p, p - 1);
-        }
+    // For any prime p, φ(p) = p - 1
+    let primes = vec![2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31];
+    for p in primes {
+        assert_eq!(euler_totient(p), p - 1, "φ({p}) should be {}", p - 1);
     }
 }
+}