diff --git a/test/heap_test.cc b/test/heap_test.cc
--- a/test/heap_test.cc
+++ b/test/heap_test.cc
@@ -1,6 +1,6 @@
-/* -*- C++ -*-
+/* -*- 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) 2003-2008
  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
@@ -40,42 +40,42 @@
 typedef ListDigraph Digraph;
 DIGRAPH_TYPEDEFS(Digraph);
 
-char test_lgf[] = 
-  "@nodes\n" 
-  "label\n"	
-  "0\n"	
-  "1\n"	
-  "2\n"	
-  "3\n"	
-  "4\n"	
-  "5\n"	
-  "6\n"	
-  "7\n"	
-  "8\n"	
-  "9\n"	
-  "@arcs\n" 
-  "		label	capacity\n"	
-  "0	5	0	94\n"	
-  "3	9	1	11\n"	
-  "8	7	2	83\n"	
-  "1	2	3	94\n"	
-  "5	7	4	35\n"	
-  "7	4	5	84\n"	
-  "9	5	6	38\n"	
-  "0	4	7	96\n"	
-  "6	7	8	6\n"	
-  "3	1	9	27\n"	
-  "5	2	10	77\n"	
-  "5	6	11	69\n"	
-  "6	5	12	41\n"	
-  "4	6	13	70\n"	
-  "3	2	14	45\n"	
-  "7	9	15	93\n"	
-  "5	9	16	50\n"	
-  "9	0	17	94\n"	
-  "9	6	18	67\n"	
-  "0	9	19	86\n"	
-  "@attributes\n" 
+char test_lgf[] =
+  "@nodes\n"
+  "label\n"
+  "0\n"
+  "1\n"
+  "2\n"
+  "3\n"
+  "4\n"
+  "5\n"
+  "6\n"
+  "7\n"
+  "8\n"
+  "9\n"
+  "@arcs\n"
+  "                label        capacity\n"
+  "0        5        0        94\n"
+  "3        9        1        11\n"
+  "8        7        2        83\n"
+  "1        2        3        94\n"
+  "5        7        4        35\n"
+  "7        4        5        84\n"
+  "9        5        6        38\n"
+  "0        4        7        96\n"
+  "6        7        8        6\n"
+  "3        1        9        27\n"
+  "5        2        10        77\n"
+  "5        6        11        69\n"
+  "6        5        12        41\n"
+  "4        6        13        70\n"
+  "3        2        14        45\n"
+  "7        9        15        93\n"
+  "5        9        16        50\n"
+  "9        0        17        94\n"
+  "9        6        18        67\n"
+  "0        9        19        86\n"
+  "@attributes\n"
   "source 3\n";
 
 int test_seq[] = { 2, 28, 19, 27, 33, 25, 13, 41, 10, 26,  1,  9,  4, 34};
@@ -88,7 +88,7 @@
   RangeMap<int> map(test_len, -1);
 
   Heap heap(map);
-  
+
   std::vector<int> v(test_len);
 
   for (int i = 0; i < test_len; ++i) {
@@ -107,7 +107,7 @@
   RangeMap<int> map(test_len, -1);
 
   Heap heap(map);
-  
+
   std::vector<int> v(test_len);
 
   for (int i = 0; i < test_len; ++i) {
@@ -128,20 +128,20 @@
 
 
 template <typename Heap>
-void dijkstraHeapTest(const Digraph& digraph, const IntArcMap& length, 
-		      Node source) {
-  
+void dijkstraHeapTest(const Digraph& digraph, const IntArcMap& length,
+                      Node source) {
+
   typename Dijkstra<Digraph, IntArcMap>::template DefStandardHeap<Heap>::
     Create dijkstra(digraph, length);
 
   dijkstra.run(source);
 
   for(ArcIt a(digraph); a != INVALID; ++a) {
-    Node s = digraph.source(a); 
+    Node s = digraph.source(a);
     Node t = digraph.target(a);
     if (dijkstra.reached(s)) {
       check( dijkstra.dist(t) - dijkstra.dist(s) <= length[a],
-      	     "Error in a shortest path tree!");
+                   "Error in a shortest path tree!");
     }
   }
 
@@ -150,7 +150,7 @@
       Arc a = dijkstra.predArc(n);
       Node s = digraph.source(a);
       check( dijkstra.dist(n) - dijkstra.dist(s) == length[a],
-	     "Error in a shortest path tree!");
+             "Error in a shortest path tree!");
     }
   }
 
@@ -161,7 +161,7 @@
   typedef int Item;
   typedef int Prio;
   typedef RangeMap<int> ItemIntMap;
-  
+
   Digraph digraph;
   IntArcMap length(digraph);
   Node source;
@@ -170,14 +170,14 @@
   digraphReader(input, digraph).
     arcMap("capacity", length).
     node("source", source).
-    run();  
- 
+    run();
+
   {
     typedef BinHeap<Prio, ItemIntMap> IntHeap;
     checkConcept<Heap<Prio, ItemIntMap>, IntHeap>();
     heapSortTest<IntHeap>();
     heapIncreaseTest<IntHeap>();
-    
+
     typedef BinHeap<Prio, IntNodeMap > NodeHeap;
     checkConcept<Heap<Prio, IntNodeMap >, NodeHeap>();
     dijkstraHeapTest<NodeHeap>(digraph, length, source);