patch 9.1.0394: Cannot get a list of positions describing a region

Problem:  Cannot get a list of positions describing a region
          (Justin M. Keyes, after v9.1.0120)
Solution: Add the getregionpos() function
          (Shougo Matsushita)

fixes: #14609
closes: #14617

Co-authored-by: Justin M. Keyes <justinkz@gmail.com>
Signed-off-by: Shougo Matsushita <Shougo.Matsu@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/usr_41.txt b/runtime/doc/usr_41.txt
index 6137cfd..26651eb 100644
--- a/runtime/doc/usr_41.txt
+++ b/runtime/doc/usr_41.txt
@@ -1,4 +1,4 @@
-*usr_41.txt*	For Vim version 9.1.  Last change: 2024 Apr 26
+*usr_41.txt*	For Vim version 9.1.  Last change: 2024 May 07
 
 		     VIM USER MANUAL - by Bram Moolenaar
 
@@ -930,6 +930,7 @@
 Working with text in the current buffer:		*text-functions*
 	getline()		get a line or list of lines from the buffer
 	getregion()		get a region of text from the buffer
+	getregionpos()		get a list of positions for a region
 	setline()		replace a line in the buffer
 	append()		append line or list of lines in the buffer
 	indent()		indent of a specific line