revert accidental indentation

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1245915 13f79535-47bb-0310-9956-ffa450edef68

hadoop-mapreduce-project/CHANGES.txt

@@ -16,7 +16,7 @@ Release 0.23.2 - UNRELEASED
     MAPREDUCE-3877 Add a test to formalise the current state transitions
     of the yarn lifecycle. (stevel)
 
-    OPTIMIZATIONS
+  OPTIMIZATIONS
 
   BUG FIXES
     MAPREDUCE-3862.  Nodemanager can appear to hang on shutdown due to lingering