bug#2209: 23.0.90; copyright-update might not update copyright

["Marshall, Simon" <Simon.Marshall@misys.com>]

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First, emacs -Q and in the initial frame create 2 windows with 2 new
files containing:

//Copyright (c) 2008 Foo
//

Now do C-x 5 2 and in the new frame do Tools | Compile RET (it doesn't
matter if there's no Makefile etc) and in the *compilation* window in
the new frame do C-x 1 M-: (add-hook 'write-file-hooks
'copyright-update) RET.

Now in the original frame, add the word "Bar" to the end of the 2nd line
in each file, leaving point at the end of the 2nd line, and leaving the
files modified.

Now in the *compilation* window in the new frame do g ! SPC SPC to
recompile/save/update the copyright notices.  

I find that one file contains the correct:

//Copyright (c) 2008, 2009 Foo
//Bar

But the other contains the erroneous:

//Copyright (c) 2008 Foo
//Bar, 2009

With point on the comma in the 2nd line.

In GNU Emacs 23.0.90.1 (sparc-sun-solaris2.8, Motif Version 2.1.0)
 of 2009-02-03 on risksun2
Windowing system distributor `Hummingbird Ltd.', version 11.0.100015
configured using `configure
'--x-includes=/usr/openwin/include:/usr/dt/include:/usr/local/include:/u
sr/local/X11/include'
'--x-libraries=/usr/openwin/lib:/usr/dt/lib:/usr/local/lib:/usr/local/X1
1/lib' '--with-x-toolkit=motif' '--with-jpeg=no' '--with-gif=no'
'--with-tiff=no''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: C
  value of $XMODIFIERS: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t




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