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/perl.vim b/runtime/ftplugin/perl.vim
index 8c6a80e..03368a7 100644
--- a/runtime/ftplugin/perl.vim
+++ b/runtime/ftplugin/perl.vim
@@ -8,6 +8,7 @@
 "                2023 Sep 07 by Vim Project (safety check: don't execute perl
 "                    from current directory)
 "                2024 Jan 14 by Vim Project (browsefilter)
+"                2024 May 24 by Riley Bruins <ribru17@gmail.com> ('commentstring')
 
 if exists("b:did_ftplugin") | finish | endif
 let b:did_ftplugin = 1
@@ -22,7 +23,7 @@
 setlocal keywordprg=perldoc\ -f
 
 setlocal comments=:#
-setlocal commentstring=#%s
+setlocal commentstring=#\ %s
 
 " Provided by Ned Konz <ned at bike-nomad dot com>
 "---------------------------------------------