diff --git a/scripts/update-copyright-header.sh b/scripts/unify-sources.sh
copy from scripts/update-copyright-header.sh
copy to scripts/unify-sources.sh
--- a/scripts/update-copyright-header.sh
+++ b/scripts/unify-sources.sh
@@ -3,13 +3,13 @@
 YEAR=`date +2003-%Y`
 HGROOT=`hg root`
 
-function update_file() {
+function update_header() {
     TMP_FILE=`mktemp`
     FILE_NAME=$1
 
-    (echo "/* -*- C++ -*-
+    (echo "/* -*- mode: C++; indent-tabs-mode: nil; -*-
  *
- * This file is a part of LEMON, a generic C++ optimization library
+ * This file is a part of LEMON, a generic C++ optimization library.
  *
  * Copyright (C) "$YEAR"
  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
@@ -32,21 +32,103 @@
      /\*\// && pm==1 { pm=2;}
     ' $1
 	) >$TMP_FILE
+
+    HEADER_CH=`diff -q $TMP_FILE $FILE_NAME >/dev/null&&echo NO||echo YES`
+
     rm $FILE_NAME
     mv $TMP_FILE $FILE_NAME
 }
 
+function update_tabs() {
+    TMP_FILE=`mktemp`
+    FILE_NAME=$1
 
+    cat $1 |
+    sed -e 's/\t/        /g' >$TMP_FILE
+
+    TABS_CH=`diff -q $TMP_FILE $FILE_NAME >/dev/null&&echo NO||echo YES`
+
+    rm $FILE_NAME
+    mv $TMP_FILE $FILE_NAME
+}
+
+function remove_trailing_space() {
+    TMP_FILE=`mktemp`
+    FILE_NAME=$1
+
+    cat $1 |
+    sed -e 's/ \+$//g' >$TMP_FILE
+
+    SPACES_CH=`diff -q $TMP_FILE $FILE_NAME >/dev/null&&echo NO||echo YES`
+
+    rm $FILE_NAME
+    mv $TMP_FILE $FILE_NAME
+}
+
+function long_line_test() {
+    cat $1 |grep -q -E '.{81,}'
+}
+
+function update_file() {
+    echo -n '    update' $i ...
+
+    update_header $1
+    update_tabs $1
+    remove_trailing_space $1
+
+    CHANGED=NO;
+    if [[ $HEADER_CH = YES ]];
+    then
+	echo -n '  [header updated]'
+	CHANGED=YES;
+    fi
+    if [[ $TABS_CH = YES ]];
+    then
+	echo -n ' [tabs removed]'
+	CHANGED=YES;
+    fi
+    if [[ $SPACES_CH = YES ]];
+    then
+	echo -n ' [trailing spaces removed]'
+	CHANGED=YES;
+    fi
+    if long_line_test $1 ;
+    then
+	echo -n ' [LONG LINES]'
+	((LONG_LINE_FILES++))
+    fi
+    echo
+    if [[ $CHANGED = YES ]];
+    then
+	((CHANGED_FILES++))
+    fi
+}
+
+CHANGED_FILES=0
+TOTAL_FILES=0
+LONG_LINE_FILES=0
 if [ $# == 0 ]; then
-    echo -n Update all source files...
+    echo Update all source files...
     for i in `hg manifest|grep -E  '\.(cc|h|dox)$'`
     do
 	update_file $HGROOT/$i
+	((TOTAL_FILES++))
     done
-    echo ' done.'
+    echo '  done.'
 else
     for i in $*
     do
 	update_file $i
+	((TOTAL_FILES++))
     done
 fi
+echo $CHANGED_FILES out of $TOTAL_FILES files has been changed.
+if [[ $LONG_LINE_FILES -gt 1 ]]; then
+    echo
+    echo WARNING: $LONG_LINE_FILES files contains long lines!    
+    echo
+elif [[ $LONG_LINE_FILES -gt 0 ]]; then
+    echo
+    echo WARNING: a file contains long lines!
+    echo
+fi