Update runtime files.
diff --git a/runtime/doc/intro.txt b/runtime/doc/intro.txt
index a000482..13542de 100644
--- a/runtime/doc/intro.txt
+++ b/runtime/doc/intro.txt
@@ -595,9 +595,9 @@
If the 'showmode' option is on "-- VREPLACE --" is
shown at the bottom of the window.
-Insert Normal mode Entered when CTRL-O given in Insert mode. This is
- like Normal mode, but after executing one command Vim
- returns to Insert mode.
+Insert Normal mode Entered when CTRL-O is typed in Insert mode (see
+ |i_CTRL-O|). This is like Normal mode, but after
+ executing one command Vim returns to Insert mode.
If the 'showmode' option is on "-- (insert) --" is
shown at the bottom of the window.