bug#64696: 30.0.50; indent-to inherits preceding text properties, including 'invisible

[Eli Zaretskii]

> From: Ihor Radchenko <yantar92@posteo.net>
> Cc: Eli Zaretskii <eliz@gnu.org>, 64696@debbugs.gnu.org
> Date: Fri, 28 Jul 2023 08:30:47 +0000
> 
> However, remember that this thread started with `indent-to' calculating
> target column without taking into account the display staff. While the
> initial column is using `current-column' and considers
> composition/faces/[partially] invisibility, the number of tabs/spaces to
> be inserted to reach target column are calculated assuming that each
> space occupies 1 column and each tab occupies tab-width columns.
> 
> Now, when we established that Emacs indentation is visual, it is clear
> that the assumption in `indent-to' is not accurate.

Since indent-to inserts only tabs and spaces, how is that assumption
inaccurate?