Fix cpplint whitespace/comments issues

Change-Id: Iae286862c85fb8fd8901eae1204cd6d271d69496
diff --git a/compiler/dex/mir_optimization.cc b/compiler/dex/mir_optimization.cc
index d79b26e..a6314f4 100644
--- a/compiler/dex/mir_optimization.cc
+++ b/compiler/dex/mir_optimization.cc
@@ -845,7 +845,7 @@
       bb = NextDominatedBlock(bb);
     }
   }
-  return false; // Not iterative - return value will be ignored
+  return false;  // Not iterative - return value will be ignored
 }