old_contents: # encoding: utf-8
  
  """
  .. codeauthor:: Tsuyoshi Hombashi <gogogo.vm@gmail.com>
  """
  
  from __future__ import absolute_import
  
  from ._error import NullNameError
  from ._error import InvalidCharError
  from ._error import InvalidCharWindowsError
  from ._error import InvalidLengthError
  from ._error import ReservedNameError
  
  from ._common import _validate_null_string
  from ._app import validate_excel_sheet_name
  from ._app import sanitize_excel_sheet_name
  from ._file import validate_filename
  from ._file import validate_file_path
  from ._file import sanitize_filename
  from ._file import sanitize_file_path
  from ._symbol import replace_symbol
  from ._var_name import validate_python_var_name
  from ._var_name import sanitize_python_var_name
  
new_contents: # encoding: utf-8
  
  """
  .. codeauthor:: Tsuyoshi Hombashi <gogogo.vm@gmail.com>
  """
  
  from __future__ import absolute_import
  
  from ._error import NullNameError
  from ._error import InvalidCharError
  from ._error import InvalidCharWindowsError
  from ._error import InvalidLengthError
  from ._error import ReservedNameError
  
  from ._app import validate_excel_sheet_name
  from ._app import sanitize_excel_sheet_name
  from ._file import validate_filename
  from ._file import validate_file_path
  from ._file import sanitize_filename
  from ._file import sanitize_file_path
  from ._symbol import replace_symbol
  from ._var_name import validate_python_var_name
  from ._var_name import sanitize_python_var_name
  
subject: Remove a unnecessary import