style: fix PEP8 violations in code formatting

Author: brandonzorn

tfinance/database.py

@@ -168,7 +168,7 @@ def select_stock(self, user: User, stock_name: str):
         )
         self.con.commit()
 
-    def get_selected_stock_byid(self, user: User, message_id) -> str:
+    def get_selected_stock_byid(self, user: User, message_id) -> str | None:
         """
             Получить название акции по id сообщения с игрой.
         :param user: Экземпляр класса User с данными об этом пользователе.
@@ -182,6 +182,7 @@ def get_selected_stock_byid(self, user: User, message_id) -> str:
             for i in data.split():
                 if str(message_id) == i.split(":")[-1]:
                     return i.split(":")[0]
+        return None
 
     def get_selected_stocks(self, user: User) -> list:
         """

tfinance/stock.py

@@ -25,8 +25,7 @@ def load_stocks(file_name: str) -> list[dict[str, str]]:
 def check_stock(stock_name: str) -> bool:
     try:
         stock = yf.download(stock_name, period="1mo")
-        if stock["Close"][-2]:
-            return True
+        return bool(stock["Close"][-2])
     except Exception as e:
         logging.exception(e)
         return False