Update runtime files
diff --git a/runtime/doc/fold.txt b/runtime/doc/fold.txt
index bb1dcb6..e8078be 100644
--- a/runtime/doc/fold.txt
+++ b/runtime/doc/fold.txt
@@ -1,4 +1,4 @@
-*fold.txt* For Vim version 9.0. Last change: 2023 Jan 29
+*fold.txt* For Vim version 9.0. Last change: 2023 Mar 24
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -353,7 +353,8 @@
'foldenable' will be set.
*za*
-za When on a closed fold: open it. When folds are nested, you
+za Summary: Toggle the fold under the cursor.
+ When on a closed fold: open it. When folds are nested, you
may have to use "za" several times. When a count is given,
that many closed folds are opened.
When on an open fold: close it and set 'foldenable'. This