message: Iterate vector of strings using a reference
diff: @@ -155,7 +155,7 @@ static std::size_t CreateTextNodes(
  const auto [text, filler] = get_cell_label(src_child);
  const std::vector<std::string> lines = absl::StrSplit(text, '\n');
  auto* dst_child = dst_node;
  - for (const auto line : lines) {
  + for (const auto& line : lines) {
  dst_child = dst_child->NewChild(
  Cell{line, filler, std::max(line.size(), kMinCellWidth)});
  }
  