adds comments

code/modules/mob/living/simple_animal/friendly/cat.dm

@@ -112,7 +112,7 @@
 	..()
 
 /mob/living/simple_animal/pet/cat/Runtime/proc/Read_Memory()
-	if(fexists("data/npc_saves/Runtime.sav"))
+	if(fexists("data/npc_saves/Runtime.sav")) //legacy compatability to convert old format to new
 		var/savefile/S = new /savefile("data/npc_saves/Runtime.sav")
 		S["family"] >> family
 		fdel(S)

code/modules/mob/living/simple_animal/friendly/dog.dm

@@ -327,7 +327,7 @@
 	..()
 
 /mob/living/simple_animal/pet/dog/corgi/Ian/proc/Read_Memory()
-	if(fexists("data/npc_saves/Ian.sav"))
+	if(fexists("data/npc_saves/Ian.sav")) //legacy compatability to convert old format to new
 		var/savefile/S = new /savefile("data/npc_saves/Ian.sav")
 		S["age"] 		>> age
 		S["record_age"]	>> record_age

code/modules/mob/living/simple_animal/hostile/megafauna/colossus.dm

@@ -289,7 +289,7 @@ Difficulty: Very Hard
 	memory_saved = TRUE
 
 /obj/machinery/smartfridge/black_box/proc/ReadMemory()
-	if(fexists("data/npc_saves/Blackbox.sav"))
+	if(fexists("data/npc_saves/Blackbox.sav")) //legacy compatability to convert old format to new
 		var/savefile/S = new /savefile("data/npc_saves/Blackbox.sav")
 		S["stored_items"] >> stored_items
 		fdel(S)

code/modules/mob/living/simple_animal/parrot.dm

@@ -923,7 +923,7 @@
 	..(gibbed)
 
 /mob/living/simple_animal/parrot/Poly/proc/Read_Memory()
-	if(fexists("data/npc_saves/Poly.sav"))
+	if(fexists("data/npc_saves/Poly.sav")) //legacy compatability to convert old format to new
 		var/savefile/S = new /savefile("data/npc_saves/Poly.sav")
 		S["phrases"] 			>> speech_buffer
 		S["roundssurvived"]		>> rounds_survived