fix: resolve ruff lint check errors

Author: harrish243

ciphers/rc4.py

@@ -31,7 +31,7 @@ def ksa(key: bytes) -> list[int]:
     return s_box
 
 
-def prga(s_box: list[int]) -> Generator[int, None, None]:
+def prga(s_box: list[int]) -> Generator[int]:
     """
     Pseudo-Random Generation Algorithm (PRGA)
     =========================================
@@ -140,7 +140,6 @@ def decrypt(ciphertext: bytes, key: bytes) -> bytes:
     # Check for doctests
     if len(sys.argv) > 1 and sys.argv[1] == "--test":
         import doctest
-
         doctest.testmod()
         sys.exit(0)
 
@@ -160,9 +159,7 @@ def decrypt(ciphertext: bytes, key: bytes) -> bytes:
             if not key_str:
                 print("Key cannot be empty!")
                 continue
-            encrypted_bytes = encrypt(
-                plain_str.encode("utf-8"), key_str.encode("utf-8")
-            )
+            encrypted_bytes = encrypt(plain_str.encode("utf-8"), key_str.encode("utf-8"))
             print(f"Ciphertext (Hex): {encrypted_bytes.hex()}")
         elif choice == "2":
             hex_str = input("Enter hex ciphertext to decrypt: ")
@@ -173,9 +170,10 @@ def decrypt(ciphertext: bytes, key: bytes) -> bytes:
             try:
                 cipher_bytes = bytes.fromhex(hex_str)
                 decrypted_bytes = decrypt(cipher_bytes, key_str.encode("utf-8"))
-                print(
-                    f"Decrypted text: {decrypted_bytes.decode('utf-8', errors='replace')}"
+                decrypted_text = decrypted_bytes.decode(
+                    "utf-8", errors="replace"
                 )
+                print(f"Decrypted text: {decrypted_text}")
             except ValueError as e:
                 print(f"Invalid input: {e}")
         else: