bug#27847: 26.0.50; mode-line-percent-position: line-based instead of char-based (optionally)

[Eli Zaretskii]

> From: Dani Moncayo <dmoncayo@gmail.com>
> Date: Thu, 27 Jul 2017 15:08:18 +0200
> 
> I'd prefer this (those) percentage(s) to be based on the number of
> _lines_ instead

What do you want to be displayed in that case when line numbers are
not counted and displayed as "???" ?  Do you want Emacs to count lines
even though the limits which control that are exceeded?

Also note that for your feature to be implemented, Emacs needs to
count lines in the entire buffer each time the buffer is changed, so I
expect this feature to slow down redisplay.