-Add a sound when tool levels up

-Fix tabs instead of spaces

init.lua

@@ -72,6 +72,10 @@ function toolranks.new_afteruse(itemstack, user, node, digparams)
     local levelup_text = "Your " .. toolranks.colors.green ..
                          itemdesc .. toolranks.colors.white ..
                          " just leveled up!"
+    minetest.sound_play("toolranks_levelup", {
+      to_player = user:get_player_name(),
+      gain = 2.0,
+    })
     minetest.chat_send_player(user:get_player_name(), levelup_text)
   end