Proper spacing, please

code/game/gamemodes/wizard/spellbook.dm

@@ -536,9 +536,9 @@
 		to_chat(user, "<span class='notice'>On second thought, maybe summoning a demon is a bad idea. You refund your points.</span>")
 
 		if(istype(O, /obj/item/antag_spawner/slaughter_demon/laughter))
-			uses+=1
+			uses += 1
 		else
-			uses+=2
+			uses += 2
 		for(var/datum/spellbook_entry/item/bloodbottle/BB in entries)
 			if(!isnull(BB.limit))
 				BB.limit++