bug#21950: 25.1.50; find-lisp-object-file-name sometimes cannot find file-name

[Tino Calancha]

> That change was made in this commit:
>
>   commit 24b7f77581c7eefe484db6cbbd661c04460c66aa
>   Committer : Stefan Monnier <monnier@iro.umontreal.ca>
>   CommitDate: Fri Jan 16 22:52:15 2015 -0500
>
>      Improve handling of doc-strings and describe-function for cl-generic
>
> So I'm guessing we don't want to change it back.
>
> Yes. Please give that a try. If it's difficult, we can see if there is a
> way to satisfy both your use case and cl-generic.

Thank you for your answer.
Im sure the change is for better, im just worry that we lost a small
piece of information in describe-function: for instance, without the 
change, (describe-function 'not) returns in buffer *Help*:

not is an alias for ‘null’ in ‘subr.el’.

(not OBJECT)

Return t if OBJECT is nil, and return nil otherwise.

But now, we get:

not is an alias for ‘null’.

(not OBJECT)

Return t if OBJECT is nil, and return nil otherwise.

I found nice to know if the alias is an user alias or an Emacs one,
and to see in which file is defined. But if people are fine with this 
small detail then would be also ok for me.

Tino