Clone invoice auto-numbering

Hey team,
When you clone an invoice, “-1″ is appended to the permalink and ” – copy” is appended to the invoice title.

Can I suggest that when an invoice already ends in a number, that this number is incremented instead?

I have invoices which look like invoicename-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1