code: def remove_symbol_add_symbol(string_item, remove_symbol, add_symbol):
      
      string_item = add_symbol.join(string_item.split(remove_symbol))
      return string_item
docs: Remove a symbol from a string, and replace it with a different one
      Args:
          string_item: String that you want to replace symbols in
          remove_symbol: Symbol to remove
          add_symbol: Symbol to add
  
      Returns: returns a string with symbols swapped