refactor OutputSystem
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@@ -1,14 +1,14 @@
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package chess.controller.commands;
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import chess.controller.Command;
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import chess.controller.OutputSystem;
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import chess.controller.PlayerCommand;
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import chess.controller.event.GameListener;
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import chess.model.Game;
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public class UndoCommand extends Command{
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@Override
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public CommandResult execute(Game game, OutputSystem outputSystem) {
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public CommandResult execute(Game game, GameListener outputSystem) {
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PlayerCommand lastAction = game.getLastAction();
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if (lastAction == null)
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return CommandResult.NotAllowed;
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