Add script for Luacheck

src/common.lua

@@ -1,6 +1,5 @@
 local ItemStack = ItemStack
 local loadstring = loadstring
-local ESC = core.formspec_escape
 local translate = core.get_translated_string
 local vec_new, vec_add, vec_mul = vector.new, vector.add, vector.multiply
 local sort, concat, insert = table.sort, table.concat, table.insert

src/gui.lua

@@ -241,9 +241,9 @@ local function get_isometric_view(fs, pos, X, Y)
 			local p = area:position(idx)
 			      p = vec_sub(p, pos)
 
+			local size = 0.25
 			local x = 2 + (size / 2 * (p.z - p.x))
 			local y = 1.15 + (size / 4 * (p.x + p.z - 2 * p.y))
-			local size = 0.25
 
 			if plant then
 				size -= 0.05

src/operators.lua

@@ -1,7 +1,7 @@
 --[[    All source files have to be preprocessed before loading.
 	This allows implementing custom operators like bitwise ones.	]]
 
-local fmt = string.format
+local fmt, split = string.format, string.split
 local var = "[%w%.%[%]\"\'_]"
 
 local operators = {
@@ -53,7 +53,7 @@ end
 local function _load(path, line, data, t)
 	if line then
 		if not t then
-			t = data:split"\n"
+			t = split(data, "\n")
 		end
 		t[line] = t[line]:gsub("(" .. var .. "+)%s?=%s?(" .. var .. "*)", "%2")
 		data = table.concat(t, "\n")