Run treefmt

cpp/flake.nix

@@ -2,11 +2,13 @@
   description = "Central C++ Dev Shell";
   inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable-small";
 
-  outputs = { self, nixpkgs }:
+  outputs =
+    { self, nixpkgs }:
     let
       system = "x86_64-linux";
       pkgs = nixpkgs.legacyPackages.${system};
-    in {
+    in
+    {
       devShells.${system}.default = pkgs.mkShell {
         nativeBuildInputs = with pkgs; [
           gcc
@@ -23,4 +25,4 @@
         '';
       };
     };
-}
+}