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/ps1xml.vim b/runtime/ftplugin/ps1xml.vim
index 17bb181..0052de1 100644
--- a/runtime/ftplugin/ps1xml.vim
+++ b/runtime/ftplugin/ps1xml.vim
@@ -3,6 +3,7 @@
 " URL:         https://github.com/PProvost/vim-ps1
 " Last Change: 2021 Apr 02
 "              2024 Jan 14 by Vim Project (browsefilter)
+"              2024 May 23 by Riley Bruins <ribru17@gmail.com> ('commentstring')
 
 " Only do this when not done yet for this buffer
 if exists("b:did_ftplugin") | finish | endif
@@ -14,7 +15,7 @@
 set cpo&vim
 
 setlocal tw=0
-setlocal commentstring=#%s
+setlocal commentstring=#\ %s
 setlocal formatoptions=tcqro
 
 " Change the browse dialog on Win32 and GTK to show mainly PowerShell-related files