Update runtime files.
diff --git a/runtime/ftplugin/matlab.vim b/runtime/ftplugin/matlab.vim
index 205111c..a1a282f 100644
--- a/runtime/ftplugin/matlab.vim
+++ b/runtime/ftplugin/matlab.vim
@@ -1,7 +1,7 @@
" Vim filetype plugin file
" Language: matlab
" Maintainer: Jake Wasserman <jwasserman at gmail dot com>
-" Last Changed: 2014 Dec 30
+" Last Change: 2019 Sep 27
" Contributors:
" Charles Campbell
@@ -24,8 +24,9 @@
setlocal suffixesadd=.m
setlocal suffixes+=.asv
+setlocal commentstring=%\ %s
-let b:undo_ftplugin = "setlocal suffixesadd< suffixes< "
+let b:undo_ftplugin = "setlocal suffixesadd< suffixes< commentstring< "
\ . "| unlet! b:match_words"
let &cpo = s:save_cpo