diff --git a/src/gui.py b/src/gui.py
index 41e95f6..9cabdd5 100644
--- a/src/gui.py
+++ b/src/gui.py
@@ -37,13 +37,19 @@ class Gui(Tk):
                 row = len(self.tabs[message.user]['items'])
                 self.tabs[message.user]['items'][message.trade.item] = {}
                 self.tabs[message.user]['items'][message.trade.item]['row'] = row
-                self.tabs[message.user]['items'][message.trade.item]['message'] =  message
+                self.tabs[message.user]['items'][message.trade.item]['message'] = message
                 ttk.Label(frame, text=message.trade.item).grid(column=0, row=row)
                 Label(frame, text=f'{message.trade.amount} {message.trade.currency}').grid(column=1, row=row)
-                self.add_button(tab=frame, text='Inv', callback=self.inv_callback, message=message).grid(column=2, row=row)
-                self.add_button(tab=frame, text='Trade', callback=self.trade_callback, message=message).grid(column=3, row=row)
-                self.add_button(tab=frame, text='Ty', callback=self.ty_callback, message=message).grid(column=4, row=row)
-                self.add_button(tab=frame, text='Wait', callback=self.wait_callback, message=message).grid(column=5, row=row)
+                self.add_button(tab=frame, text='Inv', callback=self.inv_callback,
+                                message=message).grid(column=2, row=row)
+                self.add_button(tab=frame, text='Trade', callback=self.trade_callback,
+                                message=message).grid(column=3, row=row)
+                self.add_button(tab=frame, text='Ty', callback=self.ty_callback,
+                                message=message).grid(column=4, row=row)
+                self.add_button(tab=frame,
+                                text='Wait',
+                                callback=self.wait_callback,
+                                message=message).grid(column=5, row=row)
                 self.add_button(tab=frame, text='X', callback=self.destroy_tab, message=message).grid(column=6, row=row)
                 self.tab_control.add(frame, text=message.user)
         else: