Fix remaining luacheck warnings

.luacheckrc

@@ -30,3 +30,8 @@ read_globals = {
 		}
 	},
 }
+files["init.lua"] = {
+    globals = {
+        "cartographer",
+    }
+};

init.lua

@@ -3,10 +3,6 @@ local mod_storage = minetest.get_mod_storage();
 -- The path to this mod, for including files
 local modpath = minetest.get_modpath("cartographer");
 
--- The API object
-cartographer = {
-};
-
 local map_data = {
     generated = minetest.deserialize(mod_storage:get_string("map")) or {},
 
@@ -62,9 +58,12 @@ local map_item = loadfile(modpath .. "/items.lua") (chunk, marker_lookup, gui, s
 loadfile(modpath .. "/commands.lua") (chunk, audio, map_formspec);
 loadfile(modpath .. "/table.lua") (gui, skin, audio, maps, materials, map_item);
 
-cartographer.skin = skin;
-cartographer.biomes = biomes;
-cartographer.markers = markers;
-cartographer.maps = maps;
-cartographer.map_item = map_item;
-cartographer.materials = materials;
+-- The API object
+cartographer = {
+    skin = skin;
+    biomes = biomes;
+    markers = markers;
+    maps = maps;
+    map_item = map_item;
+    materials = materials;
+};

map_formspec.lua

@@ -193,7 +193,8 @@ function map_formspec.from_map(map, x, y, height_mode)
         w = formspec_width,
         h = formspec_height,
 
-        generate_map(map.x, map.z, map.w, map.h, x, y, map.detail, map.scale, height_mode,  map_is_filled, map_get_marker, map),
+        generate_map(map.x, map.z, map.w, map.h,
+                     x, y, map.detail, map.scale, height_mode, map_is_filled, map_get_marker, map),
     }, formspec_width, formspec_height;
 end