old_contents: # encoding: utf-8
  
  """
  .. codeauthor:: Tsuyoshi Hombashi <tsuyoshi.hombashi@gmail.com>
  """
  
  from __future__ import absolute_import, unicode_literals
  
  import random
  import string
  
  
  alphanum_char_list = [x for x in string.digits + string.ascii_letters]
  
  
  INVALID_PATH_CHARS = ["\0"]
  INVALID_FILENAME_CHARS = ["/"]
  INVALID_WIN_PATH_CHARS = [":", "*", "?", '"', "<", ">", "|"] + INVALID_PATH_CHARS
  INVALID_WIN_FILENAME_CHARS = INVALID_WIN_PATH_CHARS + INVALID_FILENAME_CHARS + ["\\"]
  
  VALID_FILENAME_CHARS = [
      "!",
      "#",
      "$",
      "&",
      "'",
      "_",
      "=",
      "~",
      "^",
      "@",
      "`",
      "[",
      "]",
      "+",
      "-",
      ";",
      "{",
      "}",
      ",",
      ".",
      "(",
      ")",
      "%",
  ]
  VALID_PATH_CHARS = VALID_FILENAME_CHARS + ["/"]
  
  INVALID_JS_VAR_CHARS = INVALID_WIN_FILENAME_CHARS + [
      "!",
      "#",
      "&",
      "'",
      "=",
      "~",
      "^",
      "@",
      "`",
      "[",
      "]",
      "+",
      "-",
      ";",
      "{",
      "}",
      ",",
      ".",
      "(",
      ")",
      "%",
      " ",
      "\t",
      "\n",
      "\r",
      "\f",
      "\v",
  ]
  INVALID_PYTHON_VAR_CHARS = INVALID_JS_VAR_CHARS + ["$"]
  
  
  def make_random_str(length, char_list=alphanum_char_list):
      return "".join([random.choice(char_list) for _i in range(length)])
  
new_contents: # encoding: utf-8
  
  """
  .. codeauthor:: Tsuyoshi Hombashi <tsuyoshi.hombashi@gmail.com>
  """
  
  from __future__ import absolute_import, unicode_literals
  
  import random
  import string
  
  
  alphanum_chars = [x for x in string.digits + string.ascii_letters]
  
  
  INVALID_PATH_CHARS = ["\0"]
  INVALID_FILENAME_CHARS = ["/"]
  INVALID_WIN_PATH_CHARS = [":", "*", "?", '"', "<", ">", "|"] + INVALID_PATH_CHARS
  INVALID_WIN_FILENAME_CHARS = INVALID_WIN_PATH_CHARS + INVALID_FILENAME_CHARS + ["\\"]
  
  VALID_FILENAME_CHARS = [
      "!",
      "#",
      "$",
      "&",
      "'",
      "_",
      "=",
      "~",
      "^",
      "@",
      "`",
      "[",
      "]",
      "+",
      "-",
      ";",
      "{",
      "}",
      ",",
      ".",
      "(",
      ")",
      "%",
  ]
  VALID_PATH_CHARS = VALID_FILENAME_CHARS + ["/"]
  
  INVALID_JS_VAR_CHARS = INVALID_WIN_FILENAME_CHARS + [
      "!",
      "#",
      "&",
      "'",
      "=",
      "~",
      "^",
      "@",
      "`",
      "[",
      "]",
      "+",
      "-",
      ";",
      "{",
      "}",
      ",",
      ".",
      "(",
      ")",
      "%",
      " ",
      "\t",
      "\n",
      "\r",
      "\f",
      "\v",
  ]
  INVALID_PYTHON_VAR_CHARS = INVALID_JS_VAR_CHARS + ["$"]
  
  
  def make_random_str(length, char_list=alphanum_chars):
      return "".join([random.choice(char_list) for _i in range(length)])
  
subject: Rename a variable