patch 9.1.0464: no whitespace padding in commentstring option in ftplugins

Problem:  no whitespace padding in commentstring option in ftplugins
Solution: Change default to include whitespace padding, update
          existing filetype plugins with the new default value
          (Riley Bruins)

closes: #14843

Signed-off-by: Riley Bruins <ribru17@hotmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/ftplugin/indent.vim b/runtime/ftplugin/indent.vim
index 64a650a..32208d3 100644
--- a/runtime/ftplugin/indent.vim
+++ b/runtime/ftplugin/indent.vim
@@ -3,6 +3,7 @@
 " Maintainer:		Doug Kearns <dougkearns@gmail.com>
 " Previous Maintainer:	Nikolai Weibull <now@bitwi.se>
 " Latest Revision:	2008-07-09
+"			2024-06-02 by Riley Bruins <ribru17@gmail.com> ('commentstring')
 
 if exists("b:did_ftplugin")
   finish
@@ -14,7 +15,7 @@
 
 let b:undo_ftplugin = "setl com< cms< fo<"
 
-setlocal comments=s1:/*,mb:*,ex:*/ commentstring&
+setlocal comments=s1:/*,mb:*,ex:*/ commentstring=/*\ %s\ */
 setlocal formatoptions-=t formatoptions+=croql
 
 let &cpo = s:cpo_save