Update runtime files
diff --git a/runtime/doc/diff.txt b/runtime/doc/diff.txt
index 1c93de4..2c1233b 100644
--- a/runtime/doc/diff.txt
+++ b/runtime/doc/diff.txt
@@ -1,4 +1,4 @@
-*diff.txt* For Vim version 9.0. Last change: 2022 Oct 01
+*diff.txt* For Vim version 9.0. Last change: 2022 Dec 24
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -148,6 +148,10 @@
'foldmethod' "manual"
'foldcolumn' 0
+'foldenable' will most-likely be reset to off. That is when 'foldmethod' is
+is restored to "manual". The folds themselves are not cleared but they should
+not show up, resetting 'foldenable' is the best way to do that.
+
==============================================================================
2. Viewing diffs *view-diffs*