message: Avoid listing all modified Enter/RefEnter nodes on INFO, use VLOG(1) instead.
  Leave a single, simple, message on INFO.
diff: @@ -221,21 +221,26 @@ Status DebugNodeInserter::InsertNodes(
  }
  void DebugNodeInserter::DeparallelizeWhileLoops(Graph* graph, Device* device) {
  + bool deparallelized_a_loop = false;
  for (Node* node : graph->nodes()) {
  if (node->IsEnter()) {
  const AttrValue* parallel_iterations =
  node->attrs().Find("parallel_iterations");
  if (parallel_iterations && parallel_iterations->i() > 1) {
  - LOG(INFO) << "For debugging, tfdbg is changing the "
  - << "parallel_iterations attribute of the Enter/RefEnter "
  - << "node \"" << node->name() << "\" on device \""
  + deparallelized_a_loop = true;
  + VLOG(1) << "Changing the parallel_iterations attribute of the "
  + << "Enter/RefEnter node \"" << node->name() << "\" on device \""
  << device->name() << "\" from " << parallel_iterations->i()
  - << " to 1. (This does not affect subsequent non-debug "
  - << "runs.)";
  + << " to 1.";
  node->AddAttr<int64>("parallel_iterations", 1);
  }
  }
  }
  + if (deparallelized_a_loop) {
  + LOG(INFO) << "For debugging, tfdbg has set the parallel_iterations "
  + << "attribute of all scheduled Enter/RefEnter nodes to 1. (This "
  + << "does not affect subsequent non-debug runs.)";
  + }
  }
  // static
  