Create the audible_message() proc to replace most instance of " for(var/mob/M in hearers(...) show_message(..., 2)"

fixing typos and missing emotes in emote lists.

code/modules/assembly/signaler.dm

@@ -134,8 +134,7 @@ Code:
 	if(signal.encryption != code)	return 0
 	if(!(src.wires & WIRE_RADIO_RECEIVE))	return 0
 	pulse(1)
-	for(var/mob/O in hearers(1, src.loc))
-		O.show_message(text("\icon[] *beep* *beep*", src), 3, "*beep* *beep*", 2)
+	src.loc.audible_message("\icon[src] *beep* *beep*", null, 1)
 	return