[gtk+] Correct a doc comment

[Matthias Clasen <matthiasc src gnome org>]

commit 54863bbba61f0f40b714a83cf93dc568a9e52f83
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Aug 8 22:43:16 2009 -0400

    Correct a doc comment
    
    Add 'papi' to the list of possible print backends, and mention 'file'
    instead of 'pdf'.

 gtk/gtksettings.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtksettings.c b/gtk/gtksettings.c
index c3c1a78..4917263 100644
--- a/gtk/gtksettings.c
+++ b/gtk/gtksettings.c
@@ -741,7 +741,7 @@ gtk_settings_class_init (GtkSettingsClass *class)
    *
    * A comma-separated list of print backends to use in the print
    * dialog. Available print backends depend on the GTK+ installation,
-   * and may include "pdf", "cups" or "lpr".
+   * and may include "file", "cups", "lpr" or "papi".
    *
    * Since: 2.10
    */