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

doc/hardware.nix

@@ -1,16 +1,18 @@
-with import <nixpkgs> {} ;
+with import <nixpkgs> { };
 
 let
   inherit (builtins) stringLength readDir filter;
-  devices = filter (n: n != "families")
-    (lib.mapAttrsToList (n: t: n) (readDir ../devices));
-  texts = map (n:
-    let d = import  ../devices/${n}/default.nix;
-        d' = {
-          description = "${n}\n${substring 0 (stringLength n) "********************************"}\n";
-        } // d;
-    in d'.description)
-    devices;
+  devices = filter (n: n != "families") (lib.mapAttrsToList (n: t: n) (readDir ../devices));
+  texts = map (
+    n:
+    let
+      d = import ../devices/${n}/default.nix;
+      d' = {
+        description = "${n}\n${substring 0 (stringLength n) "********************************"}\n";
+      } // d;
+    in
+    d'.description
+  ) devices;
 in
 writeText "hwdoc" ''
   Supported hardware