Issue 4382 - Use new syntax to catch exceptions in cms

cms/bin/test_server.py

 # This file is part of the Adblock Plus web scripts,
 # Copyright (C) 2006-2016 Eyeo GmbH
 #
 # Adblock Plus is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 3 as
 # published by the Free Software Foundation.
 #
 # Adblock Plus is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
@@ skipping 142 matching lines @@
         from SocketServer import ThreadingMixIn
         from wsgiref.simple_server import WSGIServer, make_server
 
         class ThreadedWSGIServer(ThreadingMixIn, WSGIServer):
             daemon_threads = True
 
         def run(host, port, app, **kwargs):
             def wrapper(environ, start_response):
                 try:
                     return app(environ, start_response)
-                except Exception, e:
+                except Exception as e:
                     return show_error(start_response, '500 Internal Server Error',
                                       uri=environ.get('PATH_INFO'), error=e)
 
             server = make_server(host, port, wrapper, ThreadedWSGIServer)
             print ' * Running on http://%s:%i/' % server.server_address
             server.serve_forever()
 
     run(address, port, handler, use_reloader=True, use_debugger=True)