Most likely automatically fills in things properly, probably. Preferrably both fuel and ammunition, if possible.
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.
I noticed when placing furnaces that if a stack is not full, the mod if making it full size in the furnace. So if I have 1 coal, 1 wood, 1 wooden box and put down 3 furnaces, when I pick them back up I get 50 coal, 50 wood and 50 wooden boxes.
Thank you, fixed on next upload :-)