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/s6-rc-database/default.nix

@@ -2,11 +2,11 @@
 # config.services and calling s6-rc-compile on them
 
 {
-  stdenvNoCC
-, buildPackages
-, closureInfo
-, writeText
-, services ? []
+  stdenvNoCC,
+  buildPackages,
+  closureInfo,
+  writeText,
+  services ? [ ],
 }:
 let closure-info = closureInfo { rootPaths = services; };
 in stdenvNoCC.mkDerivation  {