Fix cpplint whitespace/comments issues

Change-Id: Iae286862c85fb8fd8901eae1204cd6d271d69496
diff --git a/compiler/utils/scoped_hashtable_test.cc b/compiler/utils/scoped_hashtable_test.cc
index 072da8c..d5f9f7d 100644
--- a/compiler/utils/scoped_hashtable_test.cc
+++ b/compiler/utils/scoped_hashtable_test.cc
@@ -65,4 +65,4 @@
   EXPECT_TRUE(NULL == sht.Lookup(2));
 }
 
-} // end namespace art
+}  // namespace art