bug#59828: Fundamental Mode buffers fail to keep text properties

[Eli Zaretskii]

> Date: Mon, 05 Dec 2022 14:54:47 +0000
> From: Heime <heimeborgia@protonmail.com>
> Cc: casouri@gmail.com, 59828@debbugs.gnu.org
> 
> > Conclusion: you need to turn on font-lock in that buffer.
> > 
> 
> When I use (text-mode) or (org-mode), I do not get the problem.
> 
> (with-current-buffer (get-buffer-create bufrn)
>  (text-mode)
>  (insert (propertize "G"
>  'font-lock-face '(:background "green"
>  :foreground "black"))))

Because those turn on font-lock by default.