patch 8.2.2511: Vim9: cannot use Vim9 script syntax in some places

Problem:    Vim9: cannot use Vim9 script syntax in some places.
Solution:   Add the :vim9cmd command modifier. Incompatible: Makes ":vim9"
            mean ":vim9cmd" instead of ":vim9script".
diff --git a/runtime/doc/repeat.txt b/runtime/doc/repeat.txt
index 195a202..60ef9c1 100644
--- a/runtime/doc/repeat.txt
+++ b/runtime/doc/repeat.txt
@@ -354,13 +354,15 @@
 			Vim version, or update Vim to a newer version.  See
 			|vimscript-version| for what changed between versions.
 
-:vim9[script] [noclear]				*:vim9* *:vim9script*
+:vim9s[cript] [noclear]				*:vim9s* *:vim9script*
 			Marks a script file as containing |Vim9-script|
 			commands.  Also see |vim9-namespace|.
 			Must be the first command in the file.
 			For [noclear] see |vim9-reload|.
 			Without the |+eval| feature this changes the syntax
 			for some commands.
+			See |:vim9cmd| for executing one command with Vim9
+			syntax and semantics.
 			 
 						*:scr* *:scriptnames*
 :scr[iptnames]		List all sourced script names, in the order they were