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

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

strings/stringfunctions.py

@@ -16,6 +16,7 @@ def is_upper(string: str) -> bool:
     """
     return all(ord(char) >= 65 and ord(char) <= 90 for char in string)
 
+
 def is_lower(string: str) -> bool:
     """
     Check if all characters in the string are lowercase letters.
@@ -34,6 +35,7 @@ def is_lower(string: str) -> bool:
     """
     return all(ord(char) >= 97 and ord(char) <= 122 for char in string)
 
+
 def is_alpha(string: str) -> bool:
     """
     Check if all characters in the string are alphabetical (letters).
@@ -52,6 +54,7 @@ def is_alpha(string: str) -> bool:
     """
     return all(char.isalpha() for char in string)
 
+
 def is_alnum(string: str) -> bool:
     """
     Check if all characters in the string are alphanumeric (letters or digits).
@@ -70,6 +73,7 @@ def is_alnum(string: str) -> bool:
     """
     return all(char.isalnum() for char in string)
 
+
 def is_decimal(string: str) -> bool:
     """
     Check if all characters in the string are decimal digits.
@@ -88,6 +92,7 @@ def is_decimal(string: str) -> bool:
     """
     return all(char.isdigit() for char in string)
 
+
 def is_space(string: str) -> bool:
     """
     Check if all characters in the string are whitespace characters.
@@ -106,6 +111,7 @@ def is_space(string: str) -> bool:
     """
     return all(char.isspace() for char in string)
 
+
 def is_title(string: str) -> bool:
     """
     Check if the string is in title case (first letter of each word is capital).
@@ -124,6 +130,8 @@ def is_title(string: str) -> bool:
     """
     return string.istitle()
 
+
 if __name__ == "__main__":
     import doctest
+
     doctest.testmod()