end-of-file-fixer, files were modified by this hook, no files listed

[KammutierSpule]

fix end of files.........................................................Failed
- hook id: end-of-file-fixer
- files were modified by this hook

I got this error, however, no files are listed.
All seems file with the file I am adding to commit.

[asottile]

you likely edited files in another window or tab. pre-commit can't tell the difference

[KammutierSpule]

Thanks, I'm trying to understand it..
what about this one?

don't commit to branch...................................................Failed
- hook id: no-commit-to-branch
- files were modified by this hook