Update runtime files
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 98c4869..556b171 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -1,4 +1,4 @@
-*eval.txt* For Vim version 9.0. Last change: 2022 Dec 11
+*eval.txt* For Vim version 9.0. Last change: 2023 Jan 03
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -2970,6 +2970,8 @@
deleted when the script ends). Function-local
variables are automatically deleted when the function
ends.
+ In |Vim9| script variables declared in a function or
+ script cannot be removed.
:unl[et] ${env-name} ... *:unlet-environment* *:unlet-$*
Remove environment variable {env-name}.