Move documentation to inline comments: GtkVScrollbar

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=611658

gtk/gtkvscrollbar.c

@@ -32,6 +32,20 @@
 #include "gtkintl.h"
 #include "gtkalias.h"
 
+/**
+ * SECTION:gtkvscrollbar
+ * @Short_description: A vertical scrollbar
+ * @Title: GtkVScrollbar
+ * @See_also:#GtkScrollbar, #GtkScrolledWindow
+ *
+ * The #GtkVScrollbar widget is a widget arranged vertically creating a
+ * scrollbar. See #GtkScrollbar for details on
+ * scrollbars. #GtkAdjustment pointers may be added to handle the
+ * adjustment of the scrollbar or it may be left %NULL in which case one
+ * will be created for you. See #GtkScrollbar for a description of what the
+ * fields in an adjustment represent for a scrollbar.
+ */
+
 G_DEFINE_TYPE (GtkVScrollbar, gtk_vscrollbar, GTK_TYPE_SCROLLBAR)
 
 static void