Fix CER/WER always equal to 1.0

dan/manager/training.py

@@ -1262,7 +1262,7 @@ class Manager(OCRManager):
                 )
                 predicted_tokens_len += 1
 
-                prediction_len[reached_end is False] = i + 1
+                prediction_len[reached_end == False] = i + 1  # noqa E712
                 if torch.all(reached_end):
                     break