old_contents: def sizeof_fmt(num):
      """
      Format file sizes for a humans beings.
      http://stackoverflow.com/questions/1094841/reusable-library-to-get-human-readable-version-of-file-size
      """
      for x in ['bytes', 'KB', 'MB', 'GB']:
          if num < 1024.0 and num > -1024.0:
              return "%3.1f%s" % (num, x)
          num /= 1024.0
      return "%3.1f%s" % (num, 'TB')
  
new_contents: def sizeof_fmt(num):
      """
      Format file sizes for a humans beings.
      http://stackoverflow.com/questions/1094841/reusable-library-to-get-human-readable-version-of-file-size
      """
      for x in ['bytes', 'KB', 'MB', 'GB']:
          if num < 1024.0 and num > -1024.0:
              return "%3.1f %s" % (num, x)
          num /= 1024.0
      return "%3.1f %s" % (num, 'TB')
  
subject: add spaces between value and unit in human readable format function