resolve clipp warnings

Author: zhangzhuang08

src/ciphers/aes.rs

@@ -303,7 +303,7 @@ fn key_expansion(init_key: &[Byte], num_rounds: usize) -> Vec<Byte> {
 
     for i in nk..nb * (nr + 1) {
         let mut temp_word = key[i - 1];
-        if i % nk == 0 {
+        if i.is_multiple_of(nk) {
             temp_word = sub_word(rot_word(temp_word), AesMode::Encryption) ^ RCON[i / nk];
         } else if nk > 6 && i % nk == 4 {
             temp_word = sub_word(temp_word, AesMode::Encryption);

src/general/permutations/steinhaus_johnson_trotter.rs

@@ -8,7 +8,7 @@ pub fn steinhaus_johnson_trotter_permute<T: Clone>(array: &[T]) -> Vec<Vec<T>> {
     res.push(array.clone());
     while i < len {
         if inversion_vector[i] < i {
-            if i % 2 == 0 {
+            if i.is_multiple_of(2) {
                 array.swap(0, i);
             } else {
                 array.swap(inversion_vector[i], i);

src/math/prime_numbers.rs

@@ -9,7 +9,7 @@ pub fn prime_numbers(max: usize) -> Vec<usize> {
         let mut status = true;
 
         for j in (3..stop).step_by(2) {
-            if i % j == 0 {
+            if i.is_multiple_of(j) {
                 status = false;
                 break;
             }