refactors most spans

code/modules/modular_computers/computers/modular_computer/power.dm

@@ -1,6 +1,6 @@
 /obj/item/modular_computer/proc/power_failure(var/malfunction = 0)
 	if(enabled) // Shut down the computer
-		visible_message("<span class='danger'>\The [src]'s screen flickers briefly and then goes dark.</span>")
+		visible_message(span_danger("\The [src]'s screen flickers briefly and then goes dark."))
 		if(active_program)
 			active_program.event_powerfailure(0)
 		for(var/datum/computer_file/program/PRG in idle_threads)
@@ -54,4 +54,4 @@
 		return
 	if(battery_power(power_usage))
 		return
-	power_failure()
+	power_failure()