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/eruby.vim b/runtime/ftplugin/eruby.vim
index b5c4665..b3e074a 100644
--- a/runtime/ftplugin/eruby.vim
+++ b/runtime/ftplugin/eruby.vim
@@ -5,6 +5,7 @@
 " Release Coordinator:	Doug Kearns <dougkearns@gmail.com>
 " Last Change:		2022 May 15
 "			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")
@@ -125,7 +126,7 @@
 endif
 
 " TODO: comments=
-setlocal commentstring=<%#%s%>
+setlocal commentstring=<%#\ %s\ %>
 
 let b:undo_ftplugin = "setl cms< " .
       \ " | unlet! b:browsefilter b:match_words | " . b:undo_ftplugin