runtime(help): fix end of sentence highlight in code examples

closes: #15745

Co-authored-by: Danilo Rezende <returndanilo@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

Author: chrisbra

runtime/doc/repeat.txt

@@ -1,4 +1,4 @@
-*repeat.txt*    For Vim version 9.1.  Last change: 2024 Oct 05
+*repeat.txt*    For Vim version 9.1.  Last change: 2024 Oct 16
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -1398,9 +1398,9 @@ For example, to profile the one_script.vim script file: >
 		clear the profiling statistics and start profiling again.
 
 :prof[ile] pause
-		Don't profile until the following `:profile continue`.  Can be
-		used when doing something that should not be counted (e.g., an
-		external command).  Does not nest.
+		Stop profiling until the next `:profile continue` command.
+		Can be used when doing something that should not be counted
+		(e.g., an external command).  Does not nest.
 
 :prof[ile] continue
 		Continue profiling after `:profile pause`.

runtime/syntax/help.vim

@@ -1,7 +1,7 @@
 " Vim syntax file
 " Language:	Vim help file
 " Maintainer:	The Vim Project <https://github.com/vim/vim>
-" Last Change:	2024 Oct 08
+" Last Change:	2024 Oct 16
 " Former Maintainer:	Bram Moolenaar <Bram@vim.org>
 
 " Quit when a (custom) syntax file was already loaded
@@ -47,7 +47,8 @@ syn match helpOption		"'[a-z]\{2,\}'"
 syn match helpOption		"'t_..'"
 syn match helpNormal		"'ab'"
 syn match helpCommand		"`[^` \t]\+`"hs=s+1,he=e-1 contains=helpBacktick
-syn match helpCommand		"\(^\|[^a-z"[]\)\zs`[^`]\+`\ze\([^a-z\t."']\|$\)"hs=s+1,he=e-1 contains=helpBacktick
+" doesn't allow a . directly after an ending backtick. See :helpgrep `[^`,]\+ [^`,]\+`\.
+syn match helpCommand		"\(^\|[^a-z"[]\)\zs`[^`]\+`\ze\([^a-z\t."']\|[.?!]\?$\)"hs=s+1,he=e-1 contains=helpBacktick
 syn match helpHeader		"\s*\zs.\{-}\ze\s\=\~$" nextgroup=helpIgnore
 syn match helpGraphic		".* \ze`$" nextgroup=helpIgnore
 if has("conceal")