message: Fixes regression to tf.Print that removed square braces around printed tensors.
diff: @@ -75,7 +75,8 @@ class PrintOp : public OpKernel {
  string msg;
  strings::StrAppend(&msg, message_);
  for (int i = 1; i < ctx->num_inputs(); ++i) {
  - strings::StrAppend(&msg, ctx->input(i).SummarizeValue(summarize_));
  + strings::StrAppend(&msg, "[", ctx->input(i).SummarizeValue(summarize_),
  + "]");
  }
  std::cerr << msg << std::endl;
  }
  