bug#9007: describe-function should link also to files under $HOME

[Glenn Morris]

Stefan Monnier wrote:

> There should definitely be a link there.  It works fine for the
> functions I define in my .emacs.  So you'll have to give us more detail
> for us to figure what goes wrong in your case.

Try his specific example, which refers to ~/.emacs-w3m.elc.

 I already retitled the report:

find-lisp-object-file-name fails to find "file" from "file.elc"

It special cases ~/.emacs, but fails to handle anything else of this
form.