Fix multiple instances of to_chat not being used

code/modules/admin/verbs/map_template_loadverb.dm

@@ -36,7 +36,7 @@
 	if(!map)
 		return
 	if(copytext("[map]",-4) != ".dmm")
-		usr << "Bad map file: [map]"
+		to_chat(usr, "Bad map file: [map]")
 		return
 
 	var/datum/map_template/M = new(map=map, rename="[map]")

code/modules/hydroponics/grown.dm

@@ -293,7 +293,7 @@
 
 /obj/item/weapon/reagent_containers/food/snacks/grown/attack(var/mob/living/carbon/M, var/mob/user, var/def_zone)
 	if(awakening)
-		user << "<span class='warning'>The [src] is twitching and shaking, preventing you from eating it.</span>"
+		to_chat(user, "<span class='warning'>The [src] is twitching and shaking, preventing you from eating it.</span>")
 		return
 	if(user == M)
 		return ..()
@@ -451,7 +451,7 @@
 			if("killertomato")
 				if(awakening || istype(user.loc,/turf/space))
 					return
-				user << "<span class='notice'>You begin to awaken the Killer Tomato...</span>"
+				to_chat(user, "<span class='notice'>You begin to awaken the Killer Tomato...</span>")
 				awakening = 1
 
 				spawn(30)

code/modules/mob/living/carbon/carbon.dm

@@ -761,7 +761,7 @@ var/list/ventcrawl_machinery = list(/obj/machinery/atmospherics/unary/vent_pump,
 			buckled.user_unbuckle_mob(src,src)
 		else
 			if(src && buckled)
-				src << "<span class='warning'>You fail to unbuckle yourself!</span>"
+				to_chat(src, "<span class='warning'>You fail to unbuckle yourself!</span>")
 	else
 		buckled.user_unbuckle_mob(src,src)
 

code/modules/pda/ai.dm

@@ -99,6 +99,6 @@
 	if(!istype(pAI))
 		return 0
 	if(!pAI.software["messenger"])
-		usr << "<span class='warning'>You have not purchased the digital messenger!</span>"
+		to_chat(usr, "<span class='warning'>You have not purchased the digital messenger!</span>")
 		return 0
 	return ..() && !pAI.silence_time