bug#21391: 24.5; `thing-at-point' should return a string

[Andreas Röhler]

On 07.11.2016 21:02, Eli Zaretskii wrote:
> > Cc: tino.calancha@gmail.com, 21391@debbugs.gnu.org
> > From: Dmitry Gutov <dgutov@yandex.ru>
> > Date: Mon, 7 Nov 2016 21:51:23 +0200
> >
> > > > It's pretty clearly a bug: most other "things" behave otherwise (list,
> > > > sexp, symbol). I'd very much rather we didn't retain conceptual problems
> > > > like that just for the sake of compatibility.
> > > Not sure which behavior you have in mind.  The removal of properties?
> > > Or something else?
> > Returning something other than a string or nil from thing-at-point.
> Didn't the function behave that way for quite some time?  If so, how
> come it's suddenly a problem?

Assume a lot of bugs open like #21391.
These library, which is excellent in base, needs a cleanup, resp. 
reconsideration.