refactoring: added new line

src/main/py/read_math_function.py

@@ -14,6 +14,7 @@ def is_allowed_string(type, value):
     allowed = "+-*/()^"
     return all(character.isdigit() or character in allowed for character in value)
 
+
 def calculate_string(string):
     string = string.replace('^', '**')
     try: