typo

gleu.py

@@ -233,7 +233,7 @@ class gleu(evaluate.Metric):
                     this_stats = [ s for s in gleu_calculator.gleu_stats(i,r_ind=ref) ]
                     stats_by_ref[ref] = this_stats
                     
-                iter_stats[j] = [sum(scores) or scores in zip(iter_stats[j], this_stats)]
+                iter_stats[j] = [sum(scores) for scores in zip(iter_stats[j], this_stats)]
         
         final_gleu_score = get_gleu_stats([gleu_calculator.compute_gleu(stats)
           for stats in iter_stats ])[0]