Update runtime files
diff --git a/runtime/doc/testing.txt b/runtime/doc/testing.txt
index 8dc6dc3..be2896e 100644
--- a/runtime/doc/testing.txt
+++ b/runtime/doc/testing.txt
@@ -1,4 +1,4 @@
-*testing.txt* For Vim version 8.2. Last change: 2021 Jun 23
+*testing.txt* For Vim version 8.2. Last change: 2021 Jul 07
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -82,7 +82,8 @@
*test_gui_drop_files()*
test_gui_drop_files({list}, {row}, {col}, {mods})
Drop one or more files in {list} in the window at {row}, {col}.
- This function only works when the GUI is running.
+ This function only works when the GUI is running and the
+ |drag-n-drop| feature is present.
The supported values for {mods} are:
0x4 Shift