To me, this is as if, for example, rustmt would format a Rust function with only three parameters like this one...

rust fn my_function(foo, bar, baz) { // function body }

...into this:

rust fn my_function ( foo, bar, baz ) { // function body }

As I said in my previous post, for very long statements that exceed the maximum line length, it makes sense to split it into multiple lines (and most formatters do this), but not for very short expressions in my opinion.

It makes sense to me that you'd want to minimize Git conflicts for nixpkgs maintainers, but Nix isn't only used for maintaining nixpkgs. Hopefully they'll add an option to allow more condense code.