Update runtime files
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index ba95f32..3515891 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 Oct 07
+*eval.txt* For Vim version 9.0. Last change: 2022 Nov 13
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -3073,6 +3073,10 @@
Unlock the internal variable {name}. Does the
opposite of |:lockvar|.
+ If {name} does not exist:
+ - In |Vim9| script an error is given.
+ - In legacy script this is silently ignored.
+
:if {expr1} *:if* *:end* *:endif* *:en* *E171* *E579* *E580*
:en[dif] Execute the commands until the next matching `:else`
or `:endif` if {expr1} evaluates to non-zero.