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/src/vim9.h b/src/vim9.h
index 63d7116..7c731fa 100644
--- a/src/vim9.h
+++ b/src/vim9.h
@@ -200,6 +200,7 @@
     ISN_USEDICT,    // use or clear dict saved by ISN_MEMBER/ISN_STRINGMEMBER
 
     ISN_PUT,	    // ":put", uses isn_arg.put
+    ISN_IPUT,	    // ":iput", uses isn_arg.put
 
     ISN_CMDMOD,	    // set cmdmod
     ISN_CMDMOD_REV, // undo ISN_CMDMOD