Clarify the last comment a bit.

git-svn-id: https://svn.apache.org/repos/asf/lucene/hadoop/trunk@425721 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -98,7 +98,8 @@ Trunk (unreleased changes)
     (Devaraj Das via cutting)
 
 28. HADOOP-386.  When removing excess DFS block replicas, remove those
-    on nodes with the least space first.  (Johan Oskarson via cutting)
+    on nodes with the least free space first.
+    (Johan Oskarson via cutting)
 
 
 Release 0.4.0 - 2006-06-28