Pass claim_draw=True to is_game_over()

is_game_over() does not check for 50-move rule or 3-fold repetition
unless claim_draw=True is passed

Author: rpdelaney

annotator/__main__.py

@@ -268,7 +268,7 @@ def truncate_pv(board, pv):
         assert board.is_legal(move)
         board.push(move)
 
-    if board.is_game_over():
+    if board.is_game_over(claim_draw=True):
         return pv
     else:
         return pv[:10]