   end
 
   @doc """
-  The same as `cd/0`, but raises an exception if it fails.
+  The same as `cd/1`, but raises an exception if it fails.
   """
   def cd!(path) do
     case F.set_cwd(path) do

  end

  @doc """
  Same as `stat` but returns the `File.Stat` directly and
  throws `File.Error` if an error is returned.
  """
  def stat!(path, opts // []) do

  Copies the contents of `source` to `destination`.

  Both parameters can be a filename or an io device opened
  with `open/2`. `bytes_count` specifies the number of
  bytes to copy, the default being `:infinity`.

  If file `destination` already exists, it is overwritten
