bug#31349: 27.0; Doc of `up-list'

[Eli Zaretskii]

> From: Noam Postavsky <address@hidden>
> Date: Wed, 02 May 2018 20:57:48 -0400
> Cc: address@hidden
> 
> In *scratch*, put cursor inside a string literal, e.g.,
> 
>     "point here->.<--"
> 
> doing C-M-u will bring you ouside the string in Emacs 25+.

"C-M-u" doesn't run up-list, though.