diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index 1c9f6f2..83285dd 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -1,4 +1,4 @@
-*syntax.txt*	For Vim version 9.1.  Last change: 2024 Feb 05
+*syntax.txt*	For Vim version 9.1.  Last change: 2024 Feb 06
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -1331,12 +1331,15 @@
 
 https://stackoverflow.com/questions/12407800/which-comment-style-should-i-use-in-batch-files
 
-To allow the use of the :: idiom for comments in the Windows Command
-Interpreter or working with MS-DOS bat files, set the
-dosbatch_colons_comment variable to anything: >
+To allow the use of the :: idiom for comments in command blocks with the
+Windows Command Interpreter set the dosbatch_colons_comment variable to
+anything: >
 
    :let dosbatch_colons_comment = 1
 
+If this variable is set then a :: comment that is the last line in a command
+block will be highlighted as an error.
+
 There is an option that covers whether *.btm files should be detected as type
 "dosbatch" (MS-DOS batch files) or type "btm" (4DOS batch files).  The latter
 is used by default.  You may select the former with the following line: >