`eachSystem` in flake example makes it harder to understand

New formatter: gersemi

Allow changing the diff tool used by `flake check`

xmllint always marks all files as changed

`programs.shfmt.indent_size = null` uses tabs rather than `.editorconfig` setting

nixfmt-rfc-style migrate to nixfmt & keep nixfmt-classic.

request: allow comparing examples for a specific formatter only

Biome schema hash mismatch for version 2.1.2

mix-format

[Alejandra]: config option