* Makefile.maint: Sync with CVS Autoconf.

Makefile.maint

@@ -1,6 +1,23 @@
 # -*-Makefile-*-
 # This Makefile fragment is shared between fileutils, sh-utils, textutils,
-# CPPI, Bison, and Autoconf.
+# and Autoconf.
+
+## Copyright 2001 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
+## the Free Software Foundation; either version 2, or (at your option)
+## any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program; if not, write to the Free Software
+## Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+## 02111-1307, USA.
 
 prev_version_file ?= .prev-version
 
@@ -77,13 +94,12 @@ cvs-tag-check:
 	else :; fi
 
 cvs-diff-check:
-	cvs diff | grep -v '^?' >cvs-diffs;			\
-	if grep . cvs-diff >/dev/null; then	  		\
-	  echo "Some files are locally modified:" >&2;  	\
-	  cat cvs-diffs >&2;					\
-	  exit 1;						\
-	else						  	\
+	if cvs diff >cvs-diffs; then			  	\
 	  rm cvs-diffs;					  	\
+	else						  	\
+	  echo "Some files are locally modified:" 1>&2;  	\
+	  cat cvs-diffs;					\
+	  exit 1;						\
 	fi
 
 cvs-check: cvs-diff-check cvs-tag-check