Flake8 lint error from irrelevant scripts occurred on some pull requests

[quinn-sasha]

Describe the bug

Flake 8 lint warning from pdf_watermarkadder and video_cropper.

• pdf_watermarkadder: missing whitespace after ',' on line 26 of main.py.
• video_cropper: Didn't use isinstance() for checking if an object is an instance of a class or type

To Reproduce
Steps to reproduce the behavior:

1. Create virtual environment and activate it
2. pip install flake8
3. Go to pdf_watermarkadder (or video_cropper) folder
4. flake8 main.py (if you are in video_cropper, flake8 video_cropper.py)
5. See error

Expected behavior

My pull request should pass flake8 lint check.

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

Additional context

[Davda-James]

Yes this is true today I have made a PR adding another script and there is no error in my script in linting but due to already existing scripts linting issue the linker check is failed.

[pawangeek]

@Davda-James @quinn-sasha It's solved now, either make a dummy commit or fresh PR to run this, closed by #974