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/jsonc.vim b/runtime/ftplugin/jsonc.vim
index e47a75f..ec32684 100644
--- a/runtime/ftplugin/jsonc.vim
+++ b/runtime/ftplugin/jsonc.vim
@@ -5,6 +5,7 @@
 "                   https://github.com/kevinoid/vim-jsonc
 " License:          MIT
 " Last Change:      2021 Nov 22
+"                   2024 May 23 by Riley Bruins <ribru17@gmail.com> ('commentstring')
 
 runtime! ftplugin/json.vim
 
@@ -15,7 +16,7 @@
 endif
 
 " Set comment (formatting) related options. {{{1
-setlocal commentstring=//%s comments=sO:*\ -,mO:*\ \ ,exO:*/,s1:/*,mb:*,ex:*/,://
+setlocal commentstring=//\ %s comments=sO:*\ -,mO:*\ \ ,exO:*/,s1:/*,mb:*,ex:*/,://
 
 " Let Vim know how to disable the plug-in.
 let b:undo_ftplugin = 'setlocal commentstring< comments<'