runtime(doc): make examples verbatim to prevent conceal/tag parsing

closes: #17437

Signed-off-by: Yochem van Rosmalen <git@yochem.nl>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/helphelp.txt b/runtime/doc/helphelp.txt
index 4af6efd..c49a4d5 100644
--- a/runtime/doc/helphelp.txt
+++ b/runtime/doc/helphelp.txt
@@ -1,4 +1,4 @@
-*helphelp.txt*	For Vim version 9.1.  Last change: 2025 May 31
+*helphelp.txt*	For Vim version 9.1.  Last change: 2025 Jun 03
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -412,7 +412,7 @@
 
 TAGS
 
-To define a help tag, place the name between asterisks (*tag-name*).  The
+To define a help tag, place the name between asterisks ("*tag-name*").  The
 tag-name should be different from all the Vim help tag names and ideally
 should begin with the name of the Vim plugin.  The tag name is usually right
 aligned on a line.