runtime(cuda): source c and cpp ftplugins

closes: #15383

Signed-off-by: Yinzuo Jiang <jiangyinzuo@foxmail.com>
Signed-off-by: Riley Bruins <ribru17@hotmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/ftplugin/cuda.vim b/runtime/ftplugin/cuda.vim
index 8770bdb..91d722b 100644
--- a/runtime/ftplugin/cuda.vim
+++ b/runtime/ftplugin/cuda.vim
@@ -1,16 +1,11 @@
 " Vim filetype plugin
 " Language:	CUDA
 " Maintainer:	Riley Bruins <ribru17@gmail.com>
-" Last Change:	2024 Jul 06
+" Last Change:	2024 Jul 29
 
 if exists('b:did_ftplugin')
   finish
 endif
-let b:did_ftplugin = 1
 
-" Set 'comments' to format dashed lists in comments.
-" Also include ///, used for Doxygen.
-setlocal comments=sO:*\ -,mO:*\ \ ,exO:*/,s1:/*,mb:*,ex:*/,:///,://
-setlocal commentstring=//\ %s
-
-let b:undo_ftplugin = 'setl com< cms<'
+" Behaves mostly just like C++
+runtime! ftplugin/cpp.vim