message: [Keras / Cloud TPU]: Correct indexing for software pipelining.
diff: @@ -1657,7 +1657,7 @@ class KerasTPUModel(models.Model):
  'make sure your paths are correct and you have '
  'permissions to read the files. Skipping validation')
  - for step_index in range(steps_per_epoch - 1):
  + for step_index in range(steps_per_epoch):
  batch_logs = {'batch': step_index, 'size': 1}
  callbacks.on_batch_begin(step_index, batch_logs)
  try:
  