Fix formatting; show hidden characters.

configuration.nix

@@ -46,6 +46,7 @@
       customRC = ''
       set colorcolumn=80,100
       set expandtab     " Spaces instead of tabs.
+      set list          " Show hidden characters.
       set shiftwidth=2  " # of spaces to use for each (auto)indent.
       set tabstop=2     " # of spaces a <Tab> in the file counts for.
       '';

flake.nix

@@ -28,8 +28,8 @@
             useGlobalPkgs = true;
             useUserPackages = true;
             users.jrpotter = import ./jrpotter;
-	        };
-	      }
+          };
+        }
       ];
     };
   };

jrpotter/neovim/default.nix

@@ -111,6 +111,7 @@ in
         vim.g.maplocalleader = '\\'
         vim.o.colorcolumn = '80,100'
         vim.o.expandtab = true  -- Spaces instead of tabs.
+        vim.o.list = true       -- Show hidden characters.
         vim.o.shiftwidth = 2    -- # of spaces to use for each (auto)indent.
         vim.o.tabstop = 2       -- # of spaces a <Tab> in the file counts for.
       '')