message: [contour] Avoids trying to create empty directories.
diff: @@ -363,9 +363,12 @@ std::string createDefaultConfig()
  error_code createDefaultConfig(FileSystem::path const& _path)
  {
  FileSystemError ec;
  + if (!_path.parent_path().empty())
  + {
  FileSystem::create_directories(_path.parent_path(), ec);
  if (ec)
  return ec;
  + }
  ofstream { _path.string(), ios::binary | ios::trunc } << createDefaultConfig();
  