Invoice Pdf Naming Pattern

Multi-Vendor in detail Configuration: How-tos, questions, issues
#1

How can I change the naming pattern of invoice PDF's? Currently they are being named

Invoice-"order-number".pdf

It would make more sense if they were named

Invoice-"invoice-number".pdf

Can I change this somewhere?

#2

Check app/functions/fn.cart.php

$filename = __('invoices') . '-' . implode('-', $order_ids);