code: def normalize_file(file, separators=None):
  	
  	# Normalize path separators.
  	if separators is None:
  		separators = NORMALIZE_PATH_SEPS
  	norm_file = file
  	for sep in separators:
  		norm_file = norm_file.replace(sep, posixpath.sep)
  
  	# Remove current directory prefix.
  	if norm_file.startswith('./'):
  		norm_file = norm_file[2:]
  
  	return norm_file
docs: Normalizes the file path to use the POSIX path separator (i.e., ``'/'``).
  
  	*file* (:class:`str`) is the file path.
  
  	*separators* (:class:`~collections.abc.Collection` of :class:`str`; or
  	:data:`None`) optionally contains the path separators to normalize.
  	This does not need to include the POSIX path separator (``'/'``), but
  	including it will not affect the results. Default is :data:`None` for
  	:data:`NORMALIZE_PATH_SEPS`. To prevent normalization, pass an empty
  	container (e.g., an empty tuple ``()``).
  
  	Returns the normalized file path (:class:`str`).