[MC-151857] Wrong string displayed upon /give used for multiple players

When using the /give command and targeting multiple players, the string commands.give.success.multiple should be displayed. Instead, commands.give.success.single is displayed, with the first placeholder (playername) used by number of players who were given the item.

net.minecraft.server.commands.GiveCommand#giveItem

if (collection.size() == 1) {
    cn2.sendSuccess(new TranslatableComponent("commands.give.success.single", n2, eh2.createItemStack(n2, false).getDisplayName(), collection.iterator().next().getDisplayName()), true);
} else {
    cn2.sendSuccess(new TranslatableComponent("commands.give.success.single", n2, eh2.createItemStack(n2, false).getDisplayName(), collection.size()), true);
}