let conditional .not work on default vars

Instead of needing the variable value to be directly declared, it could
be one of the default values.

modules/meta.py

@@ -399,8 +399,17 @@ class DataFile:
                                         error_text = "- exists"
                                     con_var_value = var_key[:-7]
                                 elif var_key.endswith(".not"):
-                                    if var_key[:-4] in variables:
+                                    var_name = var_key[:-4]
-                                        con_var_value = variables[var_key[:-4]]
+                                    if var_name in variables:
+                                        con_var_value = variables[var_name]
+                                        if isinstance(var_value, list):
+                                            if con_var_value in var_value:
+                                                error_text = f'in {var_value}'
+                                        elif str(con_var_value) == str(var_value):
+                                            error_text = f'is "{var_value}"'
+                                    elif var_name in default:
+                                        # TODO: consolidate
+                                        con_var_value = default[var_name]
                                         if isinstance(var_value, list):
                                             if con_var_value in var_value:
                                                 error_text = f'in {var_value}'