Change help message.

xfel_calibrate/calibrate.py

@@ -49,7 +49,7 @@ def make_initial_parser():
                         help='Filename (and optionally path) for output report')
 
     parser.add_argument('--priority', type=int, default=2,
-                        help="Priority of batch jobs. If priority>1, reserved nodes become available.")
+                        help="Priority of batch jobs. If priority<=1, reserved nodes become available.")
 
     parser.add_argument_group('required arguments')