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/javascript.vim b/runtime/ftplugin/javascript.vim
index 2633954..455b794 100644
--- a/runtime/ftplugin/javascript.vim
+++ b/runtime/ftplugin/javascript.vim
@@ -3,6 +3,7 @@
 " Maintainer:   Doug Kearns <dougkearns@gmail.com>
 " Contributor:  Romain Lafourcade <romainlafourcade@gmail.com>
 " Last Change:	2024 Jan 14
+" 		2024 May 23 by Riley Bruins <ribru17@gmail.com> ('commentstring')
 
 if exists("b:did_ftplugin")
     finish
@@ -24,7 +25,7 @@
 " Set 'comments' to format dashed lists in comments.
 setlocal comments=sO:*\ -,mO:*\ \ ,exO:*/,s1:/*,mb:*,ex:*/,://
 
-setlocal commentstring=//%s
+setlocal commentstring=//\ %s
 
 " Change the :browse e filter to primarily show JavaScript-related files.
 if (has("gui_win32") || has("gui_gtk")) && !exists("b:browsefilter")