Add luacheck to check builtin (#7895)

builtin/common/filterlist.lua

@@ -250,7 +250,6 @@ end
 
 --------------------------------------------------------------------------------
 function compare_worlds(world1,world2)
-
 	if world1.path ~= world2.path then
 		return false
 	end

builtin/common/information_formspecs.lua

@@ -31,7 +31,6 @@ local mod_cmds = {}
 local function load_mod_command_tree()
 	mod_cmds = {}
 
-	local check_player_privs = core.check_player_privs
 	for name, def in pairs(core.registered_chatcommands) do
 		mod_cmds[def.mod_origin] = mod_cmds[def.mod_origin] or {}
 		local cmds = mod_cmds[def.mod_origin]
@@ -86,8 +85,8 @@ end
 
 local function build_privs_formspec(name)
 	local privs = {}
-	for name, def in pairs(core.registered_privileges) do
-		privs[#privs + 1] = { name, def }
+	for priv_name, def in pairs(core.registered_privileges) do
+		privs[#privs + 1] = { priv_name, def }
 	end
 	table.sort(privs, function(a, b) return a[1] < b[1] end)
 
@@ -137,7 +136,7 @@ help_command.func = function(name, param)
 	if param == "" or param == "all" then
 		core.show_formspec(name, "__builtin:help_cmds",
 			build_chatcommands_formspec(name))
-		return 
+		return
 	end
 
 	return old_help_func(name, param)

builtin/common/misc_helpers.lua

@@ -128,6 +128,7 @@ function dump(o, indent, nested, level)
 	if t ~= "table" then
 		return basic_dump(o)
 	end
+
 	-- Contains table -> true/nil of currently nested tables
 	nested = nested or {}
 	if nested[o] then
@@ -136,10 +137,11 @@ function dump(o, indent, nested, level)
 	nested[o] = true
 	indent = indent or "\t"
 	level = level or 1
-	local t = {}
+
+	local ret = {}
 	local dumped_indexes = {}
 	for i, v in ipairs(o) do
-		t[#t + 1] = dump(v, indent, nested, level + 1)
+		ret[#ret + 1] = dump(v, indent, nested, level + 1)
 		dumped_indexes[i] = true
 	end
 	for k, v in pairs(o) do
@@ -148,7 +150,7 @@ function dump(o, indent, nested, level)
 				k = "["..dump(k, indent, nested, level + 1).."]"
 			end
 			v = dump(v, indent, nested, level + 1)
-			t[#t + 1] = k.." = "..v
+			ret[#ret + 1] = k.." = "..v
 		end
 	end
 	nested[o] = nil
@@ -157,10 +159,10 @@ function dump(o, indent, nested, level)
 		local end_indent_str = "\n"..string.rep(indent, level - 1)
 		return string.format("{%s%s%s}",
 				indent_str,
-				table.concat(t, ","..indent_str),
+				table.concat(ret, ","..indent_str),
 				end_indent_str)
 	end
-	return "{"..table.concat(t, ", ").."}"
+	return "{"..table.concat(ret, ", ").."}"
 end
 
 --------------------------------------------------------------------------------
@@ -407,9 +409,8 @@ if INIT == "game" then
 		end
 
 		local old_itemstack = ItemStack(itemstack)
-		local new_itemstack, removed = core.item_place_node(
-			itemstack, placer, pointed_thing, param2, prevent_after_place
-		)
+		local new_itemstack = core.item_place_node(itemstack, placer,
+				pointed_thing, param2, prevent_after_place)
 		return infinitestacks and old_itemstack or new_itemstack
 	end
 

builtin/common/serialize.lua

@@ -218,4 +218,3 @@ test_in = {escape_chars="\n\r\t\v\\\"\'", non_european="θשׁ٩∂"}
 test_out = core.deserialize(core.serialize(test_in))
 assert(test_in.escape_chars == test_out.escape_chars)
 assert(test_in.non_european == test_out.non_european)
-