Update runtime files.
diff --git a/runtime/ftplugin/cpp.vim b/runtime/ftplugin/cpp.vim
index 8c3f211..f9d31cb 100644
--- a/runtime/ftplugin/cpp.vim
+++ b/runtime/ftplugin/cpp.vim
@@ -1,12 +1,17 @@
 " Vim filetype plugin file
 " Language:	C++
 " Maintainer:	Bram Moolenaar <Bram@vim.org>
-" Last Change:	2001 Jan 15
+" Last Change:	2020 Jul 26
 
 " Only do this when not done yet for this buffer
 if exists("b:did_ftplugin")
   finish
 endif
 
-" Behaves just like C
+" Behaves mostly just like C
 runtime! ftplugin/c.vim ftplugin/c_*.vim ftplugin/c/*.vim
+
+" C++ uses templates with <things>
+" Disabled, because it gives an error for typing an unmatched ">".
+" set matchpairs+=<:>
+" let b:undo_ftplugin ..= ' | setl matchpairs<'
diff --git a/runtime/ftplugin/diff.vim b/runtime/ftplugin/diff.vim
index 3fe1b84..0464290 100644
--- a/runtime/ftplugin/diff.vim
+++ b/runtime/ftplugin/diff.vim
@@ -1,7 +1,7 @@
 " Vim filetype plugin file
 " Language:	Diff
 " Maintainer:	Bram Moolenaar <Bram@vim.org>
-" Last Change:	2005 Jul 27
+" Last Change:	2020 Jul 18
 
 " Only do this when not done yet for this buffer
 if exists("b:did_ftplugin")
@@ -13,3 +13,6 @@
 
 " Don't use modelines in a diff, they apply to the diffed file
 setlocal nomodeline
+
+" If there are comments they start with #
+let &commentstring = "# %s"
diff --git a/runtime/ftplugin/vim.vim b/runtime/ftplugin/vim.vim
index b2db4ab..b2d5710 100644
--- a/runtime/ftplugin/vim.vim
+++ b/runtime/ftplugin/vim.vim
@@ -1,7 +1,7 @@
 " Vim filetype plugin
 " Language:	Vim
 " Maintainer:	Bram Moolenaar <Bram@vim.org>
-" Last Change:	2020 Jul 06
+" Last Change:	2020 Jul 26
 
 " Only do this when not done yet for this buffer
 if exists("b:did_ftplugin")
@@ -83,7 +83,7 @@
 if exists("loaded_matchit")
   let b:match_ignorecase = 0
   let b:match_words =
-	\ '\<\%(fu\%[nction]\|def\)\>:\<retu\%[rn]\>:\<\%(endf\%[unction]\|enddef\)\>,' .
+	\ '\<\%(fu\%[nction]\|def\)\>[^(]:\<retu\%[rn]\>:\<\%(endf\%[unction]\|enddef\)\>,' .
  	\ '\<\(wh\%[ile]\|for\)\>:\<brea\%[k]\>:\<con\%[tinue]\>:\<end\(w\%[hile]\|fo\%[r]\)\>,' .
 	\ '\<if\>:\<el\%[seif]\>:\<en\%[dif]\>,' .
 	\ '{:},' .