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

[Richard Stallman]

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  > > This begs the question: why outline-regexp includes ‘^L’?

  > Yes, I wondered about that, too.

^L at the beginning of a line separates pages.
I don't know exactly what that regexp is for, but that is
probably why ^L appears.

-- 
Dr Richard Stallman (https://stallman.org)
Chief GNUisance of the GNU Project (https://gnu.org)
Founder, Free Software Foundation (https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)