docs: def sanitize(filename: str, platform: str=None) -> str:
      """
      Remove disallowed characters from potential filename. Currently only guaranteed on Linux and
      OS X.
      """
      win_map = {
          # taken from samba Catia module.
          # https://www.samba.org/samba/docs/current/man-html/vfs_catia.8.html
          "\"": "¨",
          "*": "¤",
          "/": "ÿ",
          ":": "÷",
          "<": "«",
          ">": "»",
          "?": "¿",
          "\\": "ÿ",
          "|": "¦",
      }
  
      posix_map = {
          "/": "-",
      }
  
      if platform is None:
          platform = sys.platform
  
      if platform.startswith("win32"):
          replace_map = win_map
      else:
          replace_map = posix_map
  
      for key, entry in replace_map.items():
          filename = filename.replace(key, entry)
  
      return filename