Examine Hud hotfixing (tgstation#86607)

## About The Pull Request

I tested these in every single iteration but the final one.

So it was doing `string + list()` and runtiming because it lost a `. =
list()`

## Changelog

:cl: Melbert
fix: Med/sec hud examine 
/:cl:

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

@@ -472,25 +472,33 @@
 	return
 
 /mob/living/carbon/human/get_hud_examine_info(mob/living/user)
+	. = list()
+
 	var/perpname = get_face_name(get_id_name(""))
+	var/title = ""
 	if(perpname && (HAS_TRAIT(user, TRAIT_SECURITY_HUD) || HAS_TRAIT(user, TRAIT_MEDICAL_HUD)) && (user.stat == CONSCIOUS || isobserver(user)) && user != src)
 		var/datum/record/crew/target_record = find_record(perpname)
 		if(target_record)
 			. += "Rank: [target_record.rank]"
 			. += "<a href='?src=[REF(src)];hud=1;photo_front=1;examine_time=[world.time]'>\[Front photo\]</a><a href='?src=[REF(src)];hud=1;photo_side=1;examine_time=[world.time]'>\[Side photo\]</a>"
 		if(HAS_TRAIT(user, TRAIT_MEDICAL_HUD) && HAS_TRAIT(user, TRAIT_SECURITY_HUD))
-			. += separator_hr("Medical & Security Analysis")
+			title = separator_hr("Medical & Security Analysis")
 			. += get_medhud_examine_info(user, target_record)
 			. += get_sechud_examine_info(user, target_record)
 
 		else if(HAS_TRAIT(user, TRAIT_MEDICAL_HUD))
-			. += separator_hr("Medical Analysis")
+			title = separator_hr("Medical Analysis")
 			. += get_medhud_examine_info(user, target_record)
 
 		else if(HAS_TRAIT(user, TRAIT_SECURITY_HUD))
-			. += separator_hr("Security Analysis")
+			title = separator_hr("Security Analysis")
 			. += get_sechud_examine_info(user, target_record)
 
+	// applies the separator correctly without an extra line break
+	if(title && length(.))
+		.[1] = title + .[1]
+	return .
+
 /// Collects information displayed about src when examined by a user with a medical HUD.
 /mob/living/carbon/proc/get_medhud_examine_info(mob/living/user, datum/record/crew/target_record)
 	. = list()