Sometimes a program or software don’t start for a syntax error, and if you check the files there is nothing wrong..apparently.
There are a lot of characters that usually are not printed if you use a normal text editor, but you can easily check if they are present with your terminal and the command
As first thing let’s create a simple text file with these special characters, open a terminal and run the command:
printf 'testing\012\011\011testing\014\010\012more testing\012\011\000\013\000even more testing\012\011\011\011\012' > /tmp/testing.txt
Now if you open the file with an editor you’ll have different results.
cat will show:
$ cat /tmp/testing.txt testing testing more testing even more testing