Furnaces should not be able to give out spoilage

[TheRailmaker]

There is a very small chance for a fuel based furnace to actually give out spoilage: when the input fuel spoils while it is in the input-inserter.
The spoilage will stay on the output slot of the furnace now, like we see in the picture.

I think this should be changed for consitency because :


-A furnace is able to burn spoilage and also burns the fuel if its spoiling inside
-Furnaces usally dont give out fuel
-Since its a quite rare interaction alot of players like me will wonder why this happens and have to ask others
122884

My suggestion would be to keep the spoilage inside the furnace and use it as fuel.
Maybe with a second fuel slot, which is only activated in this special scenario.