Minor style cleaning in handlers

handlers/nodeboxes.lua

 xdecor.box = {
-	slab_y = function(height, shift) return { -0.5, -0.5+(shift or 0), -0.5, 0.5, -0.5+height+(shift or 0), 0.5 } end,
-	slab_z = function(depth) return { -0.5, -0.5, -0.5+depth, 0.5, 0.5, 0.5 } end,
-	bar_y = function(radius) return {-radius, -0.5, -radius, radius, 0.5, radius} end,
-	cuboid = function(radius_x, radius_y, radius_z) return {-radius_x, -radius_y, -radius_z, radius_x, radius_y, radius_z} end
+	slab_y = function(height, shift)
+		return { -0.5, -0.5+(shift or 0), -0.5, 0.5, -0.5+height+(shift or 0), 0.5 }
+	end,
+	slab_z = function(depth)
+		return { -0.5, -0.5, -0.5+depth, 0.5, 0.5, 0.5 }
+	end,
+	bar_y = function(radius)
+		return { -radius, -0.5, -radius, radius, 0.5, radius }
+	end,
+	cuboid = function(radius_x, radius_y, radius_z)
+		return { -radius_x, -radius_y, -radius_z, radius_x, radius_y, radius_z }
+	end
 }
 
 xdecor.nodebox = {
@@ -14,6 +22,7 @@ local mt = {}
 mt.__index = function(table, key)
 	local ref = xdecor.box[key]
 	local ref_type = type(ref)
+
 	if ref_type == "function" then
 		return function(...)
 			return { type = "fixed", fixed = ref(...) }
@@ -21,8 +30,11 @@ mt.__index = function(table, key)
 	elseif ref_type == "table" then
 		return { type = "fixed", fixed = ref }
 	elseif ref_type == "nil" then
-		error(key .. "could not be found among nodebox presets and functions")
+		error(key.."could not be found among nodebox presets and functions")
 	end
-	error("unexpected datatype " .. tostring(type(ref)) .. " while looking for " .. key)
+
+	error("unexpected datatype "..tostring(type(ref)).." while looking for "..key)
 end
+
 setmetatable(xdecor.nodebox, mt)
+

handlers/registration.lua

@@ -44,7 +44,7 @@ local function get_formspec_by_size(size)
 	return formspec or default_inventory_formspecs
 end
 
-local function drop_stuff() -- thanks to LNJplus for this function
+local function drop_stuff()
 	return function(pos, oldnode, oldmetadata, digger)
 		local meta = minetest.get_meta(pos)
 		meta:from_table(oldmetadata)