Glob behaviour is weird

[bitbloxhub]

Describe the bug

Basically, the way treefmt globs files, you need both **/filename and filename if the file could be in the repo root.

To Reproduce

Steps to reproduce the behavior:

1. Check out skills-flake commit 703380e
2. Run nix fmt
3. skills-flake.lock.json is formatted

Expected behavior

skills-flake.lock.json is not formatted.

System information

Treefmt 2.5.0 via Nix.

Fine if this is expected behavior, just surprising and not documented anywhere.

[jfly]

I believe plain */filename is enough, see https://github.com/numtide/treefmt-nix/pull/453/changes/BASE..df392e099d949c9f9be0e27dc9737104ac558b99#r2653498970.

I agree this is confusing and at the least should be documented. It also may currently be the only way to specify something like "this file, but only at the root".

I personally would prefer a more gitignore style behavior where foo matches files named foo everywhere, and /foo matches only files named foo at the root of the repo.