bug#34952: files with/out final newline look the same no matter what

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Fri, 07 Aug 2020 09:29:20 +0200
> Cc: 34952@debbugs.gnu.org,
>  積丹尼 Dan Jacobson <jidanni@jidanni.org>
> 
> I'm not familiar with the code in whitespace.el, but it seemed totally
> trivial to add (since Emacs has a regexp for end-of-buffer), so I've now
> added it.  Give a shout if it doesn't work properly...

<SHOUT>
This addition causes the last character highlighted in annoying red
color when typing at the end of the buffer.  Can we do better by NOT
highlighting character at EOB when point is at EOB, please?  That
would be in line with whitespace-mode behavior regarding trailing
whitespace that precedes point.
</SHOUT>

Thanks.