unrelated luacheck 'fixes'

compat/ehlphabet.lua

@@ -10,7 +10,7 @@ local skip = {}
 for _, n in ipairs(exceptions) do skip[n] = true end
 
 local function ehlphabet_number_sticker(item_name)
-	if not item_name or not 'string' == type(item_name) then return end
+	if not item_name or 'string' ~= type(item_name) then return end
 
 	return item_name:match('^ehlphabet:([0-9]+)'),
 		item_name:find('_sticker$') and true

compat/letters.lua

@@ -3,7 +3,7 @@ if not minetest.get_modpath('letters') then return end
 -- for inspection tool
 local S = replacer.S
 local function add_recipe_u(item_name, _, recipes)
-	if not item_name or not 'string' == type(item_name) then return end
+	if not item_name or 'string' ~= type(item_name) then return end
 
 	local input, letter = item_name:match('^(.+)_letter_(.)u$')
 	if not input then return end
@@ -21,7 +21,7 @@ replacer.register_craft_method('letters:upper', 'letters:letter_cutter_upper', a
 
 
 local function add_recipe_l(item_name, _, recipes)
-	if not item_name or not 'string' == type(item_name) then return end
+	if not item_name or 'string' ~= type(item_name) then return end
 
 	local input, letter = item_name:match('^(.+)_letter_(.)l$')
 	if not input then return end

compat/wine.lua

@@ -20,7 +20,7 @@ in_out['wine:glass_coffee_liquor'] = 'farming:coffee_beans'
 in_out['wine:glass_champagne'] = 'wine:glass_champagne_raw'
 
 local function add_recipe(item_name, _, recipes)
-	if not 'string' == type(item_name)
+	if 'string' ~= type(item_name)
 		or not item_name:find('^wine:glass_') then return end
 
 	-- this one is an exception