cleanup whitespace and commas

* [] is now [ ]
* {} is now { }
* commas in arglists go at end of line not beginning

In short, I ran the whole thing through nixfmt-rfc-style but only
accepted about 30% of its changes. I might grow accustomed to more
of it over time

pkgs/preinit/default.nix

@@ -1,12 +1,9 @@
-{
-  stdenv
-, gdb
- }:
+{ stdenv, gdb }:
 stdenv.mkDerivation {
   name = "preinit";
   src = ./.;
 
-#  NIX_DEBUG=2;
+  #  NIX_DEBUG=2;
   hardeningDisable = [ "all" ];
 
   postBuild = ''
@@ -14,8 +11,8 @@ stdenv.mkDerivation {
     ls -l preinit
   '';
 
-  makeFlags = ["preinit"];
-  stripAllList = ["bin"];
+  makeFlags = [ "preinit" ];
+  stripAllList = [ "bin" ];
   installPhase = ''
     mkdir -p $out/bin
     cp preinit $out/bin