New ignored file didn't append to a new line

[leesiongchan]

Describe the bug
New ignored file didn't append to a new line

To Reproduce
Steps to reproduce the behavior:

1. Click 'i' on file
2. See .gitignore

Expected behavior
Should append to a new line

Screenshots
If applicable, add screenshots to help explain your problem.

Context (please complete the following information):

• OS/Distro + Version: Manjaro
• GitUI Version 0.8.1
• Rust version: 1.44

Additional context
Add any other context about the problem here.

[extrawurst]

hi @leesiongchan thanks for reporting this! unfortunately I cannot reproduce it so far. the potential failure surface is rather small: a problem in writing to the .gitignore file. anyway what you describe is not even 'crashing' the app which means the ignore method does not even literally fail.

I guess I need more help to reproduce it: what folder of your repo did u run gitui in? what file did you try to ignore.
And can you please run gitui with logging enabled and provide it: (see https://github.com/extrawurst/gitui#diagnostics)

[leesiongchan]

Do you have empty line at last in .gitignore? Try removing it, I am able to reproduce it if my .gitignore isn't end with an empty line

[extrawurst]

@leesiongchan now I realise what you mean! thanks! 🙏