Update runtime files
diff --git a/runtime/doc/undo.txt b/runtime/doc/undo.txt
index 34d8054..cc33482 100644
--- a/runtime/doc/undo.txt
+++ b/runtime/doc/undo.txt
@@ -105,13 +105,13 @@
After this a "u" command will undo the delete command and the previous
change.
- *undo-break*
-To do the opposite, break a change into two undo blocks, in Insert mode use
-CTRL-G u. This is useful if you want an insert command to be undoable in
+ *undo-break* *undo-close-block*
+To do the opposite, use a new undo block for the next change, in Insert mode
+use CTRL-G u. This is useful if you want an insert command to be undoable in
parts. E.g., for each sentence. |i_CTRL-G_u|
-Setting the value of 'undolevels' also breaks undo. Even when the new value
-is equal to the old value. In |Vim9| script: >
+Setting the value of 'undolevels' also closes the undo block. Even when the
+new value is equal to the old value. In |Vim9| script: >
&undolevels = &undolevels
In legacy script: >
let &undolevels = &undolevels