Core: make update_reachable_regions local variables more wordy (Archi…

…pelagoMW#2522)

BaseClasses.py

@@ -651,34 +651,34 @@ def __init__(self, parent: MultiWorld):
 
     def update_reachable_regions(self, player: int):
         self.stale[player] = False
-        rrp = self.reachable_regions[player]
-        bc = self.blocked_connections[player]
+        reachable_regions = self.reachable_regions[player]
+        blocked_connections = self.blocked_connections[player]
         queue = deque(self.blocked_connections[player])
-        start = self.multiworld.get_region('Menu', player)
+        start = self.multiworld.get_region("Menu", player)
 
         # init on first call - this can't be done on construction since the regions don't exist yet
-        if start not in rrp:
-            rrp.add(start)
-            bc.update(start.exits)
+        if start not in reachable_regions:
+            reachable_regions.add(start)
+            blocked_connections.update(start.exits)
             queue.extend(start.exits)
 
         # run BFS on all connections, and keep track of those blocked by missing items
         while queue:
             connection = queue.popleft()
             new_region = connection.connected_region
-            if new_region in rrp:
-                bc.remove(connection)
+            if new_region in reachable_regions:
+                blocked_connections.remove(connection)
             elif connection.can_reach(self):
                 assert new_region, f"tried to search through an Entrance \"{connection}\" with no Region"
-                rrp.add(new_region)
-                bc.remove(connection)
-                bc.update(new_region.exits)
+                reachable_regions.add(new_region)
+                blocked_connections.remove(connection)
+                blocked_connections.update(new_region.exits)
                 queue.extend(new_region.exits)
                 self.path[new_region] = (new_region.name, self.path.get(connection, None))
 
                 # Retry connections if the new region can unblock them
                 for new_entrance in self.multiworld.indirect_connections.get(new_region, set()):
-                    if new_entrance in bc and new_entrance not in queue:
+                    if new_entrance in blocked_connections and new_entrance not in queue:
                         queue.append(new_entrance)
 
     def copy(self) -> CollectionState: