fixed: units will flee to the previous square more often

(2 bugs: unit._previous_square was incorrectly updated after movement; and the fleeing unit was considering more candidates even after finding an acceptable one, potentially ignoring unit._previous_square)

soundrts/worldentity.py

@@ -103,6 +103,7 @@ def _move_to_new_place(self, new_place):
             self.place.leave(self)
             if not new_place:
                 self.place.world.unregister_entity(self)
+        self._previous_square = self.place
         self.place = new_place
         if new_place:
             new_place.enter(self)

soundrts/worldroom.py

@@ -168,10 +168,6 @@ def __getstate__(self):
             del d["spiral"]
         return d
 
-    def enter(self, o):
-        super().enter(o)
-        o._previous_square = self
-
     def is_near(self, square):  # FIXME: not used (remove?)
         try:
             return (abs(self.col - square.col), abs(self.row - square.row)) in (

soundrts/worldunit.py

@@ -677,6 +677,7 @@ def flee(self):
             ):
                 self.notify("flee")
                 self.take_order(["go", s.id], imperative=True)
+                break
 
     def decide(self):
         if self.is_inside: