Update app.py

app.py

@@ -439,7 +439,7 @@ def censor_middle(number, num_to_hide=4):
   start_index = middle_index - num_to_hide // 2
   end_index = middle_index + num_to_hide // 2
 
-  censored_part = "*" * num_to_hide
+  censored_part = "\*" * num_to_hide
   censored_number = number_str[:start_index] + censored_part + number_str[end_index:]
 
   return censored_number