Function upOneLevel

core/filetools.cpp:250–261

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  std::string upOneLevel(const std::string &name)
  {
    if (isRoot(name))
      return name;

    std::string s(name);
    if (isOnlyDirectory(name))
      s = stripTrailingSlash(s);

    fs::path p(s);
    return p.parent_path().string();
  }

  std::string upMultipleLevels(const std::string &name, unsigned int nrOfLevels)
  {