Re: Documentation for car and cdr

[Luc Teirlinck]

Richard Stallman wrote:

   How about this:

       Return the car of cons cell (or list) CONS.  If arg is nil, return nil.
       Error if arg is not nil and not a cons cell.  See also `car-safe'.

Violates the convention stated in `(elisp)Documentation Tips' that the
first line of a docstring should not be wider than 67 characters.
(71 in this case.)  The only list that is not a cons cell is nil,
which is mentioned on the same line.

Sincerely,

Luc.