adventure: name the zone the treasure actually came from

Every Tier 5 treasure line said the Abyssal Maw, whichever zone the drop
came from. A find in Dragon's Lair announced itself as the Maw while
Pete's dispatch, which reads the real location off the fact, named the
Lair. Two tellings of one moment that disagreed about where it happened.

Substitute the location instead, in the room announce and the discovery
DM both. {location_mid} lowercases the leading article so a line reads
"found in the Abyssal Maw" after a preposition; {location} keeps the
display form for sentence-initial and "The {location}" positions, which
the T1-T4 pools already rely on.

internal/plugin/adventure_flavor_treasure.go

@@ -232,7 +232,7 @@ var TreasureDiscovery = map[int][]string{
 	// No exclamation marks. No enthusiasm. Just weight.
 	5: {
 		"The {treasure_name}.\n\n" +
-			"You found it in the Abyssal Maw. It found you in the Abyssal Maw. " +
+			"You found it in {location_mid}. It found you in {location_mid}. " +
 			"The distinction matters less at depth.\n" +
 			"BONUS: {bonus_desc}.\n\n" +
 			"It came with you. Some things don't come with you. This one did. " +
@@ -240,15 +240,15 @@ var TreasureDiscovery = map[int][]string{
 
 		"The {treasure_name} is in your inventory.\n\n" +
 			"BONUS: {bonus_desc}.\n\n" +
-			"This is a Tier 5 rare. The Abyssal Maw doesn't give these up. " +
-			"The Abyssal Maw gave this one up. " +
+			"This is a Tier 5 rare. Nothing in {location_mid} gives these up. " +
+			"Something in {location_mid} gave this one up. " +
 			"That's a sentence worth sitting with.",
 
 		"You have the {treasure_name}.\n\n" +
 			"BONUS: {bonus_desc}.\n\n" +
-			"It was in the Abyssal Maw. The things that were between you and it " +
+			"It was in {location_mid}. The things that were between you and it " +
 			"are not between anything and anything anymore. " +
-			"The Maw is noting this. So is the item.",
+			"The place is noting this. So is the item.",
 
 		"The {treasure_name}.\n\n" +
 			"It's warm. It was warm when you found it, which it shouldn't be, " +
@@ -262,14 +262,14 @@ var TreasureDiscovery = map[int][]string{
 			"The {treasure_name}. {bonus_desc}.\n\n" +
 			"You have it. " +
 			"Keep it somewhere it won't be lost. " +
-			"The Abyssal Maw does not give second chances.",
+			"There are no second chances in {location_mid}.",
 
 		"The {treasure_name} is yours.\n\n" +
 			"BONUS: {bonus_desc}.\n\n" +
-			"The Abyssal Maw had it. You have it now. " +
-			"The Maw is aware of the transfer. " +
-			"The Maw is considering its position. " +
-			"You should not be in the Maw when it finishes considering.",
+			"It sat in {location_mid} until you took it. You have it now. " +
+			"The place is aware of the transfer. " +
+			"The place is considering its position. " +
+			"You should not be in {location_mid} when it finishes considering.",
 	},
 }