[ADD] Add libele avenant facture

models/project.py

@@ -465,7 +465,9 @@ class Project(models.Model):
                 if not benef.invoice_id:
                     account_invoice_id = self.create_invoice(
                         product_id, partner, benef.montant)
-                    account_invoice_id.write({'is_avenant': True})
+                    account_invoice_id.write({
+                        'is_avenant': True,
+                        'name': partner.name + " - avenant"})
                     benef.write({'invoice_id': account_invoice_id.id})
 
     # ------------------------------------------------------