> I get the following error:
>
> Debugger entered--Lisp error: (void-function describe-simplify-lib-
> file-name)
> describe-simplify-lib-file-name(nil)
> describe-variable(nil nil nil)
> call-interactively(describe-variable nil nil)
>
> when I try to use describe-variable()
>
> I searched for describe-simplify-lib-file-name in my emacs configs and
> found it in only once in help-fns+.el.
>
> Then I looked into lisp/Changelog and found the following entry that
> mentions describe-simplify-lib-file-name(). I am using Emacs version
> 23.0.60.1.
>
> 2008-09-01 Martin Rudalics
>
> * help-fns.el (describe-simplify-lib-file-name) ...