when a Minecart is placed on a rail and then broken, when it is then picked up is has its entity name:
entity.MinecartTNT.name = Minecart with TNT
entity.MinecartFurnace.name = Minecart with Furnace
container.minecart = Minecart with Chest
entity.minecartRideble.name = Minecart
The name is in Italics so it is as if it were named in an anvil.
I have not tested it on other computers yet.