clarify items order error message

bin/anvi-export-items-order

@@ -61,8 +61,10 @@ def main(args):
             items_order_of_interest = item_orders_dict[item_order]
 
     if not items_order_of_interest:
-        raise ConfigError("The item order '%s' is not one of the item orders in the database. This what you "
-                          "have in there: '%s'." % (order_name, ', '.join(item_order_names)))
+        raise ConfigError(f"The item order '{order_name}' is not one of the item orders in the database. Here "
+                          f"is a comma-separated list of what you have in there (please note that you can, but do not need "
+                          f"to include the distance/clustering types after the ':' character in each name): "
+                          f"{', '.join(item_order_names)}")
 
     order_data_type_newick = items_order_of_interest['type'] == 'newick'
     run.info("Database", db_path)