[iagno] About dialog: use en dash to indicate a range

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 2521fbe7caa246eccc3df8d1248e23e079aa7bbb
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Mon Jan 20 17:49:00 2014 -0600

    About dialog: use en dash to indicate a range

 src/iagno.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/iagno.vala b/src/iagno.vala
index d40f68a..46792fc 100644
--- a/src/iagno.vala
+++ b/src/iagno.vala
@@ -298,7 +298,7 @@ public class Iagno : Gtk.Application
                                "name", _("Iagno"),
                                "version", VERSION,
                                "copyright",
-                               "Copyright \xc2\xa9 1998-2008 Ian Peters",
+                               "Copyright © 1998–2008 Ian Peters",
                                "license-type", Gtk.License.GPL_2_0,
                                "comments", _("A disk flipping game derived from Reversi\n\nIagno is a part 
of GNOME Games."),
                                "authors", authors,