Method get_prefix_text

src/indicators.hpp:2449–2455

  }

  std::pair<std::string, int> get_prefix_text() {
    std::stringstream os;
    os << get_value<details::ProgressBarOption::prefix_text>();
    const auto result = os.str();
    const auto result_size = unicode::display_width(result);
    return {result, result_size};
  }

  std::pair<std::string, int> get_postfix_text() {
    std::stringstream os;