[gtk+] levelbar: Document CSS node ordering

[Matthias Clasen <matthiasc src gnome org>]

commit 8096740ea4d8cdbff315152dfc06d55f1801f2eb
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Jan 22 23:30:36 2016 -0500

    levelbar: Document CSS node ordering

 gtk/gtklevelbar.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtklevelbar.c b/gtk/gtklevelbar.c
index 18232a6..f819543 100644
--- a/gtk/gtklevelbar.c
+++ b/gtk/gtklevelbar.c
@@ -102,6 +102,9 @@
  * mode, the number of filled and unfilled nodes corresponds to blocks that are
  * drawn. The block.filled nodes also get a style class .level-name corresponding
  * to the level for the current value.
+ *
+ * In horizontal orientation, the nodes are always arranged from left to right,
+ * regardless of text direction.
  */
 #include "config.h"