separate food /non-food items from crop files, tidy code

crops/blackberry.lua

@@ -1,7 +1,8 @@
 
-local S = farming.translate
+local S = minetest.get_translator("farming")
+
+-- item/seed
 
--- blackberries
 minetest.register_craftitem("farming:blackberry", {
 	description = S("Blackberries"),
 	inventory_image = "farming_blackberry.png",
@@ -9,14 +10,17 @@ minetest.register_craftitem("farming:blackberry", {
 		compostability = 48, seed = 2, food_blackberries = 1, food_blackberry = 1,
 		food_berry = 1
 	},
+	on_use = minetest.item_eat(1),
+
 	on_place = function(itemstack, placer, pointed_thing)
 		return farming.place_seed(itemstack, placer, pointed_thing, "farming:blackberry_1")
-	end,
-	on_use = minetest.item_eat(1)
+	end
 })
 
 farming.add_eatable("farming:blackberry", 1)
 
+-- crop definition
+
 local def = {
 	drawtype = "plantlike",
 	tiles = {"farming_blackberry_1.png"},
@@ -36,17 +40,21 @@ local def = {
 }
 
 -- stage 1
+
 minetest.register_node("farming:blackberry_1", table.copy(def))
 
 -- stage 2
+
 def.tiles = {"farming_blackberry_2.png"}
 minetest.register_node("farming:blackberry_2", table.copy(def))
 
 -- stage 3
+
 def.tiles = {"farming_blackberry_3.png"}
 minetest.register_node("farming:blackberry_3", table.copy(def))
 
--- stage 4
+-- stage 4 (final)
+
 def.tiles = {"farming_blackberry_4.png"}
 def.groups.growing = nil
 def.selection_box = farming.select_final
@@ -60,6 +68,7 @@ def.drop = {
 minetest.register_node("farming:blackberry_4", table.copy(def))
 
 -- add to registered_plants
+
 farming.registered_plants["farming:blackberry"] = {
 	crop = "farming:blackberry",
 	seed = "farming:blackberry",
@@ -69,6 +78,7 @@ farming.registered_plants["farming:blackberry"] = {
 }
 
 -- mapgen
+
 minetest.register_decoration({
 	deco_type = "simple",
 	place_on = {"default:dirt_with_grass", "mcl_core:dirt_with_grass"},