bug#51016: 28.0.50; 'diff-font-lock-prettify' breaks display of outline headers

[Juri Linkov]

>> >> This begs the question: why outline-regexp includes ‘^L’?
>> >
>> > Yes, I wondered about that, too.
>>
>> I guess no one will notice the absence of ^L because
>> the default outline-regexp used by everyone in org-mode is
>> "\\*+ "
>
> Why are you talking about Org, when the proposed change is in
> outline.el?

Because most people use Org that has more reasonable defaults.

> Please don't change the behavior of outline.el in
> backward-incompatible ways.  This is used for NEWS and similar files,
> and those do have ^L separators in them.

The proposed change is to improve NEWS and similar files to make
their views more compact by fitting more lines on the screen.