message: `export`: Shorten the date format
diff: @@ -102,11 +102,11 @@ namespace vcpkg::Commands::Export
  {
  const tm date_time = System::get_current_date_time();
  - // Format is: YYYY-mm-dd_HH-MM-SS
  - // 19 characters + 1 null terminating character will be written for a total of 20 chars
  - char mbstr[20];
  - const size_t bytes_written = std::strftime(mbstr, sizeof(mbstr), "%Y-%m-%d_%H-%M-%S", &date_time);
  - Checks::check_exit(VCPKG_LINE_INFO, bytes_written == 19, "Expected 19 bytes to be written, but %u were written", bytes_written);
  + // Format is: YYYYmmdd-HHMMSS
  + // 15 characters + 1 null terminating character will be written for a total of 16 chars
  + char mbstr[16];
  + const size_t bytes_written = std::strftime(mbstr, sizeof(mbstr), "%Y%m%d-%H%M%S", &date_time);
  + Checks::check_exit(VCPKG_LINE_INFO, bytes_written == 15, "Expected 15 bytes to be written, but %u were written", bytes_written);
  const std::string date_time_as_string(mbstr);
  return ("exported-" + date_time_as_string);
  }
  