docs: def natural_sorted(iterable):
      """Return human sorted list of strings.
  
      E.g. for sorting file names.
  
      >>> natural_sorted(['f1', 'f2', 'f10'])
      ['f1', 'f2', 'f10']
  
      """
      def sortkey(x):
          return [(int(c) if c.isdigit() else c) for c in re.split(numbers, x)]
  
      numbers = re.compile(r'(\d+)')
      return sorted(iterable, key=sortkey)