bug#12553: vc-dir info documentation contains two q command entries

[mike.boldt@gmail.com]

There are two entries for the `q' command in the vc-dir documentation.
Here is a patch that converts the second one to describe the `z'
command.

Thanks,
Mike

=== modified file 'doc/emacs/ChangeLog'
*** doc/emacs/ChangeLog	2012-09-08 20:09:06 +0000
--- doc/emacs/ChangeLog	2012-10-01 18:15:37 +0000
***************
*** 1,3 ****
--- 1,8 ----
+ 2012-10-01  Michael William Boldt  <mike.boldt@gmail.com>
+ 
+ 	* maintaining.texi (VC Directory Commands): Replace duplicate `q'
+ 	command entry in VC Directory Commands with `z' entry.
+ 
  2012-09-08  Jambunathan K  <kjambunathan@gmail.com>
  
  	* regs.texi (Text Registers): `C-x r +' can now be used instead of

=== modified file 'doc/emacs/maintaining.texi'
*** doc/emacs/maintaining.texi	2012-07-06 04:31:46 +0000
--- doc/emacs/maintaining.texi	2012-10-01 17:14:40 +0000
*************** files and directories.
*** 1206,1213 ****
  Hide files with @samp{up-to-date} status
  (@code{vc-dir-hide-up-to-date}).
  
! @item q
! Quit the VC Directory buffer, and bury it (@code{quit-window}).
  @end table
  
  @findex vc-dir-mark
--- 1206,1213 ----
  Hide files with @samp{up-to-date} status
  (@code{vc-dir-hide-up-to-date}).
  
! @item z
! Kill the VC Directory buffer (@code{kill-this-buffer}).
  @end table
  
  @findex vc-dir-mark