try to fix bug

horizon-metrics.py

@@ -183,13 +183,13 @@ class HorizonMetrics(evaluate.Metric):
             self.predictions = predictions[0]
             print(self.ground_truth_det)
             print(self.predictions)
+
         try:
-             print(np.asarray(self.ground_truth_det).shape)
+            print(np.asarray(self.ground_truth_det).shape)
             print(np.asarray(self.predictions).shape)
         except:
             # no nothing
             pass
-       
 
         # calculate erros and store values in slope_error_list and midpoint_error_list
         for annotated_horizon, proposed_horizon in zip(self.ground_truth_det,