Make statistics information table.

def make_statistics_information(info):
  """Make statistics information table."""
  if not info.splits.total_num_examples:
    # That means that we have yet to calculate the statistics for this.
    return "None computed"

  stats = [(info.splits.total_num_examples, "ALL")]
  for split_name, split_info in info.splits.items():
    stats.append((split_info.num_examples, split_name.upper()))
  # Sort reverse on number of examples.
  stats.sort(reverse=True)
  stats = "\n".join([
      "{0:10} | {1:>10,}".format(name, num_exs) for (num_exs, name) in stats
  ])
  return STATISTICS_TABLE.format(split_statistics=stats)