Fix unit tests

Author: tleonhardt

cmd2.py

@@ -1501,7 +1501,7 @@ def sigint_handler(self, signum, frame):
     def preloop(self):
         """Hook method executed once when the cmdloop() method is called."""
         # Register a default SIGINT signal handler for Ctrl+C
-        signal.signal(signalnum=signal.SIGINT, handler=self.sigint_handler)
+        signal.signal(signal.SIGINT, self.sigint_handler)
 
     def precmd(self, statement):
         """Hook method executed just before the command is processed by ``onecmd()`` and after adding it to the history.

tests/test_cmd2.py

@@ -915,6 +915,8 @@ def say_app():
     return app
 
 def test_interrupt_quit(say_app):
+    say_app.quit_on_sigint = True
+
     # Mock out the input call so we don't actually wait for a user's response on stdin
     m = mock.MagicMock(name='input')
     m.side_effect = ['say hello', KeyboardInterrupt(), 'say goodbye', 'eof']