patch 9.1.1224: cannot :put while keeping indent

Problem:  cannot :put while keeping indent (Peter Aronoff)
Solution: add the :iput ex command (64-bitman)

fixes: #16225
closes: #16886

Co-authored-by: zeertzjq <zeertzjq@outlook.com>
Co-authored-by: Hirohito Higashi <h.east.727@gmail.com>
Signed-off-by: 64-bitman <60551350+64-bitman@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/index.txt b/runtime/doc/index.txt
index 06a24e0..024102c 100644
--- a/runtime/doc/index.txt
+++ b/runtime/doc/index.txt
@@ -1,4 +1,4 @@
-*index.txt*     For Vim version 9.1.  Last change: 2025 Jan 03
+*index.txt*     For Vim version 9.1.  Last change: 2025 Mar 18
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -1400,6 +1400,8 @@
 |:inoremenu|	:inoreme[nu]	like ":noremenu" but for Insert mode
 |:intro|	:int[ro]	print the introductory message
 |:interface|	:interface	start of an interface declaration
+|:iput|		:ip[ut]		like |:put|, but adjust the indent to the
+				current line
 |:isearch|	:is[earch]	list one line where identifier matches
 |:isplit|	:isp[lit]	split window and jump to definition of
 				identifier