Appending an asterisk to the end of each line

[Seymore4Head]

On Tue, 05 Jul 2016 19:29:21 -0400, Seymore4Head
<Seymore4Head at Hotmail.invalid> wrote:

>On Tue, 5 Jul 2016 19:15:23 -0400, Joel Goldstick
><joel.goldstick at gmail.com> wrote:
>
>>On Tue, Jul 5, 2016 at 7:03 PM, MRAB <python at mrabarnett.plus.com> wrote:
>>> On 2016-07-05 23:05, Seymore4Head wrote:
>>>>
>>>> import os
>>>>
>>>> f_in = open('win.txt', 'r')
>>>> f_out = open('win_new.txt', 'w')
>>>>
>>>> for line in f_in.read().splitlines():
>>>>     f_out.write(line + " *\n")
>>>>
>>>> f_in.close()
>>>> f_out.close()
>>>>
>>>> os.rename('win.txt', 'win_old.txt')
>>>> os.rename('win_new.txt', 'win.txt')
>>>>
>>>>
>>>> I just tried to reuse this program that was posted several months ago.
>>>> I am using a text flie that is about 200 lines long and have named it
>>>> win.txt.  The file it creates when I run the program is win_new.txt
>>>> but it's empty.
>>>>
>>> Although it creates a file called "win_new.txt", it then renames it to
>>> "win.txt", so "win_new.txt" shouldn't exist.
>>>
>>> Of course, if there's already a file called "win_old.txt", then the first
>>> rename will raise an exception, and you'll have "win_new.txt" and the
>>> original "win.txt".
>>>
>>> --
>>> https://mail.python.org/mailman/listinfo/python-list
>>
>>Why don't you comment out the renames, and see what happens?
>
>I really don't care if the filename gets renamed or not.  I commented
>out the renames, but I still get a new file called win_new.txt and it
>is empty.
>
>The original is unchanged.

I just tried this on a 3 line text file and it works.

I am looking through the text file and have found at least two
suspicious characters.  One is a German letter and the other is a
characters that has been replaced by a square symbol.