Some of my 2006-07-03 changes to tests/*/Makefile.am were being

backed out due to updates provoked by the copyright changes.
* tests/Makefile.am.in (PATH): Prepend $(VG_PATH_PREFIX), so that
it propagates to the derived Makefile.am files.
($(srcdir)/Makefile.am): Mark generated .am files as read-only,
so we don't mistakenly edit them again.
* tests/cut/Makefile.am: Regenerate.
* tests/head/Makefile.am: Likewise.
* tests/join/Makefile.am: Likewise.
* tests/pr/Makefile.am: Likewise.
* tests/sort/Makefile.am: Likewise.
* tests/tac/Makefile.am: Likewise.
* tests/tail/Makefile.am: Likewise.
* tests/test/Makefile.am: Likewise.
* tests/tr/Makefile.am: Likewise.
* tests/uniq/Makefile.am: Likewise.
* tests/wc/Makefile.am: Likewise.

tests/pr/Makefile.am

@@ -1,7 +1,7 @@
-# Make coreutils tests for "pr".			-*-Makefile-*-
+# Make coreutils tests.					-*-Makefile-*-
 
-# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
-# 2005, 2006 Free Software Foundation, Inc.
+# Copyright (C) 1997, 1998, 2000, 2003, 2004, 2006 Free Software
+# Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -18,8 +18,6 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 # 02110-1301, USA.
 
-## Process this file with automake to produce Makefile.in -*-Makefile-*-.
-
 ##test-files-begin
 x = pr
 explicit = 0F 0FF 0FFnt 0FFt 0FnFnt 0FnFt 0Fnt 0Ft 2-S_f-t_notab 2-Sf-t_notab \
@@ -154,4 +152,5 @@ $(srcdir)/Makefile.am: ../Makefile.am.in Test.pm $(mk_script)
 	  echo "x = $$tool" >> $@t
 	$(PERL) -I$(srcdir) -w -- $(mk_script) $(srcdir) --list >> $@t
 	sed -n '/^##test-files-end/,$$p' $(srcdir)/../Makefile.am.in >> $@t
+	chmod -w $@t
 	mv $@t $@