--- jsr166/src/main/java/util/AbstractMap.java	2010/09/05 21:32:18	1.28
+++ jsr166/src/main/java/util/AbstractMap.java	2010/09/30 01:53:03	1.29
@@ -523,7 +523,7 @@ public abstract class AbstractMap<K,V> i
             sb.append(value == this ? "(this Map)" : value);
             if (! i.hasNext())
                 return sb.append('}').toString();
-            sb.append(", ");
+            sb.append(',').append(' ');
         }
     }