embed script has syntax highlight

ftplugin/logrotate.vim

@@ -1,13 +1,13 @@
 vim9script
 # Vim filetype plugin file
-# Language: confini
+# Language: logrotate
 #
 if exists("b:did_ftplugin")
   finish
 endif
 b:did_ftplugin = 1
 
-def LogrotateHelp(msg: string = expand("<cword>"))
+def LogrotateHelp(word: string)
     const searchcmd =<< trim END
         COLUMNS=80 man logrotate 2>/dev/null | 
         gawk '/^CONFIGURATION FILE DIRECTIVES/,/^SCRIPTS/' | gawk '
@@ -20,13 +20,13 @@ def LogrotateHelp(msg: string = expand("<cword>"))
             print(substr($0, 8))
         }'
     END
-    printf(join(searchcmd, "\n"), expand("<cword>"))
+    printf(join(searchcmd, "\n"), word)
         ->systemlist()
         ->popup_atcursor({ "padding": [0, 1, 1, 1] })
 enddef
 
 command -nargs=1 LogRt :call LogrotateHelp(<f-args>)
 
-b:undo_ftplugin = "setlocal commentstring< formatoptions< keywordprg<"
+b:undo_ftplugin = "setlocal comments< commentstring< formatoptions< keywordprg<"
 
-setlocal commentstring=#\ %s formatoptions-=t formatoptions+=croql keywordprg=:LogRt
+setlocal comments=:# commentstring=#\ %s formatoptions-=t formatoptions+=croql keywordprg=:LogRt