commit db1665868ff33375f6ea235ffbbb1996d7946c05
Author: Nicholas Marriott <nicholas.marriott@gmail.com>
Date:   Mon Jun 24 08:11:46 2024 +0000

    Check the underline style colour against the correct default value again
    (it was changed from 0 to 8), from Romain Francoise.

diff --git a/grid.c b/grid.c
index edada819e1..7862941999 100644
--- a/grid.c
+++ b/grid.c
@@ -88,7 +88,7 @@ grid_need_extended_cell(const struct grid_cell_entry *gce,
 		return (1);
 	if ((gc->fg & COLOUR_FLAG_RGB) || (gc->bg & COLOUR_FLAG_RGB))
 		return (1);
-	if (gc->us != 0) /* only supports 256 or RGB */
+	if (gc->us != 8) /* only supports 256 or RGB */
 		return (1);
 	if (gc->link != 0)
 		return (1);