[gtk+] app: improve doc of gtk_application_set_accels_for_action()

[Sébastien Wilmet <swilmet src gnome org>]

commit 40e40b7ffc01f445d1084a1788559068f2197d6b
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sat Apr 9 17:42:12 2016 +0200

    app: improve doc of gtk_application_set_accels_for_action()
    
    When reading the API for the first time I didn't know what was the
    "detailed" action name.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=764846

 gtk/gtkapplication.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkapplication.c b/gtk/gtkapplication.c
index 6786d56..df6795a 100644
--- a/gtk/gtkapplication.c
+++ b/gtk/gtkapplication.c
@@ -1702,6 +1702,9 @@ normalise_detailed_name (const gchar *detailed_action_name)
  * To remove all accelerators for an action, use an empty, zero-terminated
  * array for @accels.
  *
+ * For the @detailed_action_name, see g_action_parse_detailed_name() and
+ * g_action_print_detailed_name().
+ *
  * Since: 3.12
  */
 void