Update runtime files
diff --git a/runtime/doc/testing.txt b/runtime/doc/testing.txt
index 97faea0..362f2b9 100644
--- a/runtime/doc/testing.txt
+++ b/runtime/doc/testing.txt
@@ -1,4 +1,4 @@
-*testing.txt* For Vim version 9.0. Last change: 2023 May 04
+*testing.txt* For Vim version 9.0. Last change: 2023 May 18
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -166,15 +166,17 @@
Set or drag the left, right or horizontal scrollbar. Only
works when the scrollbar actually exists. The supported
items in {args} are:
- which: scrollbar. The supported values are:
+ which: Selects the scrollbar. The supported values
+ are:
left Left scrollbar of the current window
right Right scrollbar of the current window
hor Horizontal scrollbar
- value: amount to scroll. For the vertical scrollbars
- the value can be 1 to the line-count of the
- buffer. For the horizontal scrollbar the
- value can be between 1 and the maximum line
- length, assuming 'wrap' is not set.
+ value: Amount to scroll. For the vertical scrollbars
+ the value can be between 0 to the line-count
+ of the buffer minus one. For the horizontal
+ scrollbar the value can be between 1 and the
+ maximum line length, assuming 'wrap' is not
+ set.
dragging: 1 to drag the scrollbar and 0 to click in the
scrollbar.