code: func InitRCS(ctx context.Context, id RCSBackend, path, name, email string) (RCS, error) {
  	if be, found := rcsRegistry[id]; found {
  		return be.Init(ctx, path, name, email)
  	}
  	return nil, errors.Wrapf(ErrNotFound, "unknown backend: %d", id)
  }
docs: // InitRCS initializes a new repository.