cleanup codestyle a bit

inventory_plus/init.lua

@@ -71,8 +71,8 @@ inventory_plus.get_formspec = function(player, page)
 	local formspec = "size[8,7.5]"
 		.. default.gui_bg
 		.. default.gui_bg_img
-		.. default.gui_slots
-		.. "list[current_player;main;0,3.5;8,4;]" ..
+        .. default.gui_slots
+        .. "list[current_player;main;0,3.5;8,4;]" ..
         "image[5.998,1;1,1;gui_furnace_arrow_bg.png^[transformR270]"..
         default.get_hotbar_bg(0,3.509)