runtime(doc): list of new/changed features in version9.txt

closes: #13753

Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index 6f05055..3f2aea9 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -1,4 +1,4 @@
-*builtin.txt*	For Vim version 9.0.  Last change: 2023 Dec 14
+*builtin.txt*	For Vim version 9.0.  Last change: 2023 Dec 24
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -5163,8 +5163,12 @@
 			for [key, value] in items(mydict)
 			   echo key .. ': ' .. value
 			endfor
+<
+		A List or a String argument is also supported.  In these
+		cases, items() returns a List with the index and the value at
+		the index.
 
-<		Can also be used as a |method|: >
+		Can also be used as a |method|: >
 			mydict->items()
 
 job_ functions are documented here: |job-functions-details|