Update runtime files
diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index 8299597..299bcba 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -1,4 +1,4 @@
-*builtin.txt* For Vim version 8.2. Last change: 2022 Feb 04
+*builtin.txt* For Vim version 8.2. Last change: 2022 Feb 08
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -4670,9 +4670,11 @@
:echo islocked('alist') " 1
:echo islocked('alist[1]') " 0
-< When {expr} is a variable that does not exist you get an error
- message. Use |exists()| to check for existence.
- In Vim9 script it does not work for local variables.
+< When {expr} is a variable that does not exist -1 is returned.
+ If {expr} uses a range, list or dict index that is out of
+ range or does not exist you get an error message. Use
+ |exists()| to check for existence.
+ In Vim9 script it does not work for local function variables.
Can also be used as a |method|: >
GetName()->islocked()