runtime(help): Add better support for language annotation highlighting

closes: #16238

Co-authored-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: h_east <h.east.727@gmail.com>
Signed-off-by: Shougo Matsushita <Shougo.Matsu@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/os_dos.txt b/runtime/doc/os_dos.txt
index 96ef39d..03c88dc 100644
--- a/runtime/doc/os_dos.txt
+++ b/runtime/doc/os_dos.txt
@@ -1,4 +1,4 @@
-*os_dos.txt*    For Vim version 9.1.  Last change: 2024 Sep 24
+*os_dos.txt*    For Vim version 9.1.  Last change: 2024 Dec 25
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -292,9 +292,9 @@
 'shellquote'	   "
 'shellxquote'						 "
 
-For Dos 16 bit this starts the shell as:
+For Dos 16 bit this starts the shell as: >
 	<shell> -c "command name" >file
-For Win32 as:
+For Win32 as: >
 	<shell> -c "command name >file"
 For DOS 32 bit, DJGPP does this internally somehow.