patch 9.1.0890: %! item not allowed for 'rulerformat'

Problem:  %! item not allowed for 'rulerformat'
          (yatinlala)
Solution: also allow to use %! for rulerformat option
          (Yegappan Lakshmanan)

fixes: #16091
closes: #16118

Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 57d4af8..e9f35e4 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 24
+*options.txt*	For Vim version 9.1.  Last change: 2024 Nov 27
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -7870,6 +7870,7 @@
 	All fields except the {item} are optional.  A single percent sign can
 	be given as "%%".
 
+							*stl-%!*
 	When the option starts with "%!" then it is used as an expression,
 	evaluated and the result is used as the option value.  Example: >
 		:set statusline=%!MyStatusLine()