Actually when posting an invoice its description is copied to the accounting move line description.
In some cases would be great to have some specific information about invoice in move description whether it has got description or it hasn’t. As an example, in supplier invoices the supplier invoice number (reference).
Proposal
Allow to customize the account move line description of an invoice with most relevant information of it: date, reference, number, party, …
The parametrization can be done in accounting journal and by default will be the invoice description (current behavior).
The account move description could be use this customization as well.
Indeed it was implemented for the three documents. But it shows only one of the three options. So maybe we should display always number and reference in such way that there is no mixing (maybe by keeping the convention that reference is also surrounded by []).