move_agent: Handle single positions that are lists

Only the first element is checked, since iterating though all would be slower.

mesa/space.py

@@ -435,7 +435,7 @@ def move_agent(
                        cells are the same distance, one is chosen randomly.
         """
         # Handle single position case quickly
-        if isinstance(pos, tuple):
+        if isinstance(pos, (tuple, list)) and isinstance(pos[0], (int, float)):
             pos = self.torus_adj(pos)
             self.remove_agent(agent)
             self.place_agent(agent, pos)