bug#39360: Add :extend attribute to show-paren-mode expression face

[Dmitry Gutov]

On 31.01.2020 20:03, Eli Zaretskii wrote:
> > > The newline is inside the parentheses, but the empty space to the
> > > right of the newline is not part of the text.  Why should it be
> > > highlighted?
> > For the same reason that the region highlight goes to the edge of the window, I 
> > think.
> We left the region as it was to avoid too strong outcry.  In general,
> region should also not extend, IMO.

How about the reasons of consistency?

I'd be fine if region was not extended. But since we do extend it, why 
not make other face defaults in similar situations consistent with that?