Update runtime files
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index dc6e16b..a514b6f 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1,4 +1,4 @@
-*options.txt* For Vim version 9.0. Last change: 2022 Dec 31
+*options.txt* For Vim version 9.0. Last change: 2023 Jan 02
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -7686,6 +7686,8 @@
When there is error while evaluating the option then it will be made
empty to avoid further errors. Otherwise screen updating would loop.
+ When the result contains unprintable characters the result is
+ unpredictable.
Note that the only effect of 'ruler' when this option is set (and
'laststatus' is 2) is controlling the output of |CTRL-G|.