message: Fix the log format error
diff: @@ -948,13 +948,17 @@ void Model::fit(int num_epochs, int max_iter, int display, int eval_interval, in
  HCTR_LOG(INFO, ROOT,"Evaluation interval: %d, snapshot interval: %d\n",
  eval_interval,
  snapshot);
  - HCTR_LOG(INFO, ROOT,"Sparse embedding trainable: %d, dense network trainable: %d\n",
  - is_embedding_trainable_,
  - is_dense_trainable_);
  - HCTR_LOG(INFO, ROOT,"Use mixed precision: %d, scaler: %d, use cuda graph: %d\n",
  - solver_.use_mixed_precision,
  + // FYI, A string literal is statically allocated so we can assume it is safe to return it.
  + auto b2s = [](const char val) { return val? "True" : "False"; };
  +
  + HCTR_LOG(INFO, ROOT,"Sparse embedding trainable: %s, dense network trainable: %s\n",
  + b2s(is_embedding_trainable_),
  + b2s(is_dense_trainable_));
  + HCTR_LOG(INFO, ROOT,"Use mixed precision: %s, scaler: %f, use cuda graph: %s\n",
  + b2s(solver_.use_mixed_precision),
  solver_.scaler,
  - int(solver_.use_cuda_graph));
  + b2s(solver_.use_cuda_graph));
  +
  HCTR_LOG(INFO, ROOT,"lr: %f, warmup_steps: %zu, decay_start: %zu, decay_steps: %zu, decay_power: %f, end_lr: %f\n",
  solver_.lr,
  solver_.warmup_steps,
  