use en dash for copyright footer (fixes niklasf#199)

niklasf · niklasf · commit dc59e8550817 · 2017-10-29T00:08:27.000+02:00
diff --git a/docs/conf.py b/docs/conf.py
@@ -1,5 +1,7 @@
 # -*- coding: utf-8 -*-
 
+from __future__ import unicode_literals
+
 import sys
 import os
 
@@ -19,7 +21,7 @@
 
 # General information about the project.
 project = "python-chess"
-copyright = "2014-2017, Niklas Fiekas"
+copyright = "2014–2017, Niklas Fiekas"
 
 # The version.
 version = chess.__version__
