[gtk+] spinbutton: Document some style properties as deprecated

[Matthias Clasen <matthiasc src gnome org>]

commit ed2c14f4aaf0377e01f0c90f7dd3bf2cb5eeb792
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Nov 16 06:18:32 2015 -0500

    spinbutton: Document some style properties as deprecated
    
    No code change.

 gtk/gtkspinbutton.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkspinbutton.c b/gtk/gtkspinbutton.c
index 2a32e13..d698a29 100644
--- a/gtk/gtkspinbutton.c
+++ b/gtk/gtkspinbutton.c
@@ -433,6 +433,14 @@ gtk_spin_button_class_init (GtkSpinButtonClass *class)
                                     PROP_ORIENTATION,
                                     "orientation");
 
+  /**
+   * GtkSpinButton:shadow-type:
+   *
+   * Style of bevel around the sping button.
+   *
+   * Deprecated: 3.20: Use CSS to determine the style of the border;
+   *     the value of this syyle property is ignored.
+   */
   gtk_widget_class_install_style_property (widget_class,
                                            g_param_spec_enum ("shadow-type",
                                                               P_("Shadow Type"),