[gtk+/gtk-3-4] Mention GTK_DIALOG_NO_SEPARATOR in migration docs

[Matthias Clasen <matthiasc src gnome org>]

commit 7f7ed154d864ce6ac1b72a4c658f512c1f5c5e81
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat May 26 12:19:51 2012 -0400

    Mention GTK_DIALOG_NO_SEPARATOR in migration docs
    
    http://bugzilla.gnome.org/show_bug.cgi?id=647779

 docs/reference/gtk/migrating-2to3.xml |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)
---
diff --git a/docs/reference/gtk/migrating-2to3.xml b/docs/reference/gtk/migrating-2to3.xml
index bb2aad5..33d2275 100644
--- a/docs/reference/gtk/migrating-2to3.xml
+++ b/docs/reference/gtk/migrating-2to3.xml
@@ -94,6 +94,13 @@
     make CFLAGS+="-DGDK_DISABLE_DEPRECATED -DGTK_DISABLE_DEPRECATED"
     </programlisting>
   </para>
+  <para>
+    Note that some parts of our API, such as enumeration values, are
+    not well covered by the deprecation warnings. In most cases, using
+    them will require you to also use deprecated functions, which will
+    trigger warnings. But some things, like the %GTK_DIALOG_NO_SEPARATOR
+    flag that has disappeared in GTK+ 3, may not. 
+  </para>
   </section>
 
   <section>
@@ -273,7 +280,7 @@ gdk_cairo_set_source_pixbuf() instead of cairo_set_source_surface().
         <para>
           Drawing layouts clipped is often used to avoid overdraw or to
           allow drawing selections. Code would have looked like this:
-	  <informalexample><programlisting>
+          <informalexample><programlisting>
 GdkGC *gc;
 
 /* setup */