runtime(doc): update default value for fillchars option

closes: #15998

Signed-off-by: Yee Cheng Chin <ychin.git@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 7a554db..f9189e5 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1,4 +1,4 @@
-*options.txt*	For Vim version 9.1.  Last change: 2024 Nov 02
+*options.txt*	For Vim version 9.1.  Last change: 2024 Nov 06
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -3515,7 +3515,7 @@
 	Only alphanumeric characters, '-' and '_' can be used.
 
 						*'fillchars'* *'fcs'*
-'fillchars' 'fcs'	string	(default "vert:|,fold:-,eob:~")
+'fillchars' 'fcs'	string	(default "vert:|,fold:-,eob:~,lastline:@")
 			global or local to window |global-local|
 	Characters to fill the statuslines, vertical separators and special
 	lines in the window.