message: Give string variable a default initial value.
diff: @@ -216,12 +216,8 @@ void IOManager::write(sidre::Group* datagroup,
  }
  SLIC_ASSERT(h5_file_id >= 0);
  - std::string group_name;
  - if(m_comm_size == num_files)
  - {
  - group_name = "datagroup";
  - }
  - else
  + std::string group_name = "datagroup";
  + if(m_comm_size != num_files)
  {
  group_name = fmt::sprintf("datagroup_%07d", m_my_rank);
  }
  