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

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

Author: pre-commit-ci[bot]

ciphers/gronsfeld_cipher.py

@@ -7,6 +7,7 @@
 https://www.dcode.fr/gronsfeld-cipher
 """
 
+
 def gronsfeld(text: str, key: str) -> str:
     """
     Encrypt plaintext with the Gronsfeld cipher
@@ -16,22 +17,24 @@ def gronsfeld(text: str, key: str) -> str:
     >>> gronsfeld('', '123')
     ''
     """
-    alphabets = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+    alphabets = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
     keys = [int(i) for i in key]
     encrypted_text = ""
     upper_case_text = text.upper()
 
     for i, char in enumerate(upper_case_text):
         if char in alphabets:
-            new_position = (alphabets.index(char) +
-            keys[i % len(keys)]) % len(alphabets)
+            new_position = (alphabets.index(char) + keys[i % len(keys)]) % len(
+                alphabets
+            )
             shifted_letter = alphabets[new_position]
             encrypted_text += shifted_letter
         else:
             encrypted_text += char
 
     return encrypted_text
 
+
 if __name__ == "__main__":
     import doctest