Update runtime files

runtime/pack/dist/opt/matchit/doc/matchit.txt

@@ -1,10 +1,10 @@
-*matchit.txt*   Extended "%" matching
+*matchit.txt*	Extended "%" matching
 
 For instructions on installing this file, type
 	`:help matchit-install`
 inside Vim.
 
-For Vim version 8.1.  Last change:  2021 May 17
+For Vim version 8.1.  Last change:  2021 Nov 13
 
 
 		  VIM REFERENCE MANUAL    by Benji Fisher et al

runtime/pack/dist/opt/termdebug/plugin/termdebug.vim

@@ -2,7 +2,7 @@
 "
 " Author: Bram Moolenaar
 " Copyright: Vim license applies, see ":help license"
-" Last Change: 2021 Oct 26
+" Last Change: 2021 Nov 14
 "
 " WORK IN PROGRESS - Only the basics work
 " Note: On MS-Windows you need a recent version of gdb.  The one included with
@@ -1098,6 +1098,7 @@ func s:GotoAsmwinOrCreateIt()
     setlocal number
     setlocal noswapfile
     setlocal buftype=nofile
+    setlocal modifiable
 
     let asmbuf = bufnr('Termdebug-asm-listing')
     if asmbuf > 0
@@ -1180,6 +1181,7 @@ func s:HandleCursor(msg)
 	endif
       endif
       exe lnum
+      normal! zv
       exe 'sign unplace ' . s:pc_id
       exe 'sign place ' . s:pc_id . ' line=' . lnum . ' name=debugPC priority=110 file=' . fname
       if !exists('b:save_signcolumn')