bug#9115: 24.0.50; `documentation' should not return args list for CL defun*.

[Stefan Monnier]

>> (let ((doc (documentation bidule)))
>>   (or (cdr (help-split-fundoc doc nil)) doc))
>> I agree this is not super convenient.
> Yes, i think i have tried that, but it doesn't return nil for the case
> of CL-style functions.

In Emacs-24, it returns nil if the function had no docstring (the CL or
non-CL distinction is a only indirectly linked to the problem).  So the
above should return either:
- the full docstring if there's one.
- nil or the empty string or "Not documented" if there isn't any docstring.
So if you want the first line, just extract it from the output when it's
not nil.


        Stefan