style: enable OperatorWrap in checkstyle (#5212)

Author: StarDxxx

checkstyle.xml

@@ -139,7 +139,7 @@
     <module name="MethodParamPad"/>
     <!-- TODO <module name="NoWhitespaceAfter"/> -->
     <module name="NoWhitespaceBefore"/>
-    <!-- TODO <module name="OperatorWrap"/> -->
+    <module name="OperatorWrap"/>
     <!-- TODO <module name="ParenPad"/> -->
     <module name="TypecastParenPad"/>
     <module name="WhitespaceAfter"/>

src/main/java/com/thealgorithms/ciphers/AES.java

@@ -2756,8 +2756,8 @@ public static void main(String[] args) {
                     in = input.nextLine();
                     BigInteger encryptionKey = new BigInteger(in, 16);
                     System.out.println(
-                        "The encrypted message is: \n" +
-                        encrypt(plaintext, encryptionKey).toString(16)
+                        "The encrypted message is: \n"
+                        + encrypt(plaintext, encryptionKey).toString(16)
                     );
                 }
                 case 'D', 'd' -> {
@@ -2772,8 +2772,8 @@ public static void main(String[] args) {
                     in = input.nextLine();
                     BigInteger decryptionKey = new BigInteger(in, 16);
                     System.out.println(
-                        "The deciphered message is:\n" +
-                        decrypt(ciphertext, decryptionKey).toString(16)
+                        "The deciphered message is:\n"
+                        + decrypt(ciphertext, decryptionKey).toString(16)
                     );
                 }
                 default -> System.out.println("** End **");