Fix another style issue reported by cpplint.

Test: m cpplint-art-all
Change-Id: I18cd3cbc47e8df4cfa319dde756edc1539cb8720
diff --git a/runtime/transaction.h b/runtime/transaction.h
index 8cd18e3..d147038 100644
--- a/runtime/transaction.h
+++ b/runtime/transaction.h
@@ -323,7 +323,7 @@
   ScopedArenaAllocator allocator_;
 
   ScopedArenaSafeMap<mirror::Object*, ObjectLog> object_logs_;
-  ScopedArenaSafeMap<mirror::Array*, ArrayLog> array_logs_ ;
+  ScopedArenaSafeMap<mirror::Array*, ArrayLog> array_logs_;
   ScopedArenaForwardList<InternStringLog> intern_string_logs_;
   ScopedArenaForwardList<ResolveStringLog> resolve_string_logs_;
   ScopedArenaForwardList<ResolveMethodTypeLog> resolve_method_type_logs_;