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/rxi-json/default.nix

@@ -8,7 +8,8 @@ let
     url = "https://raw.githubusercontent.com/rxi/json.lua/11077824d7cfcd28a4b2f152518036b295e7e4ce/json.lua";
     hash = "sha256-DqzNpX+rwDMHNt4l9Fz1iYIaQrXg/gLk4xJffcC/K34=";
   };
-in runCommand "json" {} ''
+in
+runCommand "json" { } ''
   mkdir -p $out/share/lua/${lua.luaversion}/
   cp ${src}  $out/share/lua/${lua.luaversion}/json.lua
 ''