A weird character can appear at the end of a windows text file when saving it.

[happibum]

1. Create fileA.txt on windows.
2. Upload and open the file in the editor.
3. The option 'Insert final new-line before saving' should be turned on.
4. Edit fileA.txt so that it does not end with a new line and save it.

Then, instead of inserting a new line at the end, a weird character "NL" appears.
I guess the cause is that we inserted \n at the end also for windows text files.