[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

ciphers/shuffled_shift_cipher.py

@@ -16,7 +16,7 @@ class ShuffledShiftCipher:
 
     Each cipher object can possess an optional argument as passcode, without which a
     new passcode is generated for that object automatically.
-    
+
     Example:
     >>> cip1 = ShuffledShiftCipher('d4usr9TWxw9wMD')
     >>> cip2 = ShuffledShiftCipher()