treewide: format all files (#57)

Run `nix fmt` at the root of the repository to format all files. I've
done this on my fork and this will help me merge your changes later
without having to deal with un-formatted files.

config/plugins/utils/mini.nix

@@ -9,7 +9,7 @@
           try_as_border = true;
         };
       };
-      surround = {};
+      surround = { };
     };
   };
 }