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/swconfig/default.nix

@@ -14,8 +14,8 @@ in stdenv.mkDerivation {
   name = "swconfig";
   buildInputs = [ buildPackages.pkg-config ];
   nativeBuildInputs = [ libnl ];
-  CFLAGS="-O2 -Ifrom_kernel -I${libnl.dev}/include/libnl3";
-  LDFLAGS="-L${libnl.out}/lib";
+  CFLAGS = "-O2 -Ifrom_kernel -I${libnl.dev}/include/libnl3";
+  LDFLAGS = "-L${libnl.out}/lib";
 
   patchPhase = ''
     mkdir -p from_kernel/linux