[gnome-robots] About dialog: use en dash to indicate a range

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 1a52f52adad86722ad4d99c1594a1d5f192a0c11
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Mon Jan 20 17:57:48 2014 -0600

    About dialog: use en dash to indicate a range

 src/menu.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/menu.c b/src/menu.c
index 92c1ab2..8ee8115 100644
--- a/src/menu.c
+++ b/src/menu.c
@@ -261,7 +261,7 @@ about_cb (GtkAction * action, gpointer data)
   gtk_show_about_dialog (GTK_WINDOW (app),
                         "name", _("Robots"),
                         "version", VERSION,
-                        "copyright", "Copyright \xc2\xa9 1998-2008 Mark Rae",
+                        "copyright", "Copyright © 1998–2008 Mark Rae",
                         "license-type", GTK_LICENSE_GPL_2_0,
                         "comments", _("Based on classic BSD Robots\n\nRobots is a part of GNOME Games."),
                         "authors", authors,