Simplify demo_mode parameter

Author: mdmintz

seleniumbase/plugins/pytest_plugin.py

@@ -167,7 +167,7 @@ def pytest_addoption(parser):
                      default=True,
                      help="""This is used by the BaseCase class to tell apart
                           pytest runs from nosetest runs. (Automatic)""")
-    parser.addoption('--demo_mode', '--demo-mode',
+    parser.addoption('--demo_mode', '--demo-mode', '--demo',
                      action="store_true",
                      dest='demo_mode',
                      default=False,

seleniumbase/plugins/selenium_plugin.py

@@ -131,7 +131,7 @@ def options(self, parser, env):
             help="""Using this makes Webdriver run headlessly,
                     which is required on headless machines.""")
         parser.add_option(
-            '--demo_mode', '--demo-mode',
+            '--demo_mode', '--demo-mode', '--demo',
             action="store_true",
             dest='demo_mode',
             default=False,