docs: def backup_location(src, loc=None):
      '''
      Writes Backups of locations
  
      :param src:
          The source file/folder to backup
      :param loc:
          The target folder to backup into
  
          The backup will be called `src` + :func:`util.system.get_timestamp`.
          * If `loc` left to none, the backup gets written in the same \
          folder like `src` resides in
  
          * Otherwise the specified path will be used.
      '''
  
      from photon.util.system import get_timestamp
  
      src = _path.realpath(src)
      if not loc or not loc.startswith(_sep):
          loc = _path.dirname(src)
  
      pth = _path.join(_path.basename(src), _path.realpath(loc))
      out = '%s_backup_%s' % (_path.basename(src), get_timestamp())
  
      change_location(src, search_location(out, create_in=pth))