nixfmt-rfc-style

There is nothing in this commit except for the changes made by
nix-shell -p nixfmt-rfc-style --run "nixfmt ."

If this has mucked up your open branches then sorry about that. You
can probably nixfmt them to match before merging

pkgs/min-collect-garbage/default.nix

@@ -1,6 +1,7 @@
 {
-  stdenv
-}: stdenv.mkDerivation {
+  stdenv,
+}:
+stdenv.mkDerivation {
   name = "min-collect-garbage";
   buildInputs = [ ];
   src = ./.;