Changed parameter name and nargs value as suggested

Co-authored-by: Gabriel Gonzalez <[email protected]>

examples/mssqlclient.py

@@ -40,7 +40,7 @@
                                                                                   'Authentication (default False)')
     parser.add_argument('-debug', action='store_true', help='Turn DEBUG output ON')
     parser.add_argument('-show', action='store_true', help='show the queries')
-    parser.add_argument('-cmd', action='extend', nargs='+', help='Commands to execute in the SQL shell. Multiple commands can be passed.')
+    parser.add_argument('-command', action='extend', nargs='*', help='Commands to execute in the SQL shell. Multiple commands can be passed.')
     parser.add_argument('-file', type=argparse.FileType('r'), help='input file with commands to execute in the SQL shell')
 
     group = parser.add_argument_group('authentication')