bug#21766: 25.0.50; delete-trailing-whitespace sometimes deletes non-whitespace

[Andreas Röhler]

 On 28.10.2015 20:19, Stefan Monnier wrote:
> > > (save-match-data
> > > (skip-syntax-backward "-" (line-beginning-position)))
> [...]
> > Ok, I see it now, it is the new parse_sexp_propertize stuff which is
> > called by SETUP_SYNTAX_TABLE.
> Indeed, internal--syntax-propertize needs to be fixed so it preserves
> the match-data!
>
>
>          Stefan

When internal--syntax-propertize is fixed, the current fix will be 
useless, i.e. redundant.

Is there a task-keeper for this scenario?