[gnome-boxes] app: Fix copyright string in the about dialog

[Felipe Borges <felipeborges src gnome org>]

commit 10daaff753cb665be74082c0d3a26085f553c2fc
Author: Yash Jain <ydjainopensource gmail com>
Date:   Thu Aug 2 23:47:21 2018 +0530

    app: Fix copyright string in the about dialog
    
    Fixes #233

 src/app.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/app.vala b/src/app.vala
index 68a79ae0..9bee5397 100644
--- a/src/app.vala
+++ b/src/app.vala
@@ -110,7 +110,7 @@ public App () {
                                    "authors", authors,
                                    "translator-credits", _("translator-credits"),
                                    "comments", _("A simple GNOME 3 application to access remote or virtual 
systems"),
-                                   "copyright", "Copyright 2011 Red Hat, Inc.",
+                                   "copyright", "\xc2\xa9 2011-2018 Red Hat, Inc.",
                                    "license-type", Gtk.License.LGPL_2_1,
                                    "program-name", _("Boxes") + Config.NAME_SUFFIX,
                                    "logo-icon-name", Config.APPLICATION_ID,