Fix typo in help text

Author: rrwick

badread/__main__.py

@@ -97,8 +97,8 @@ def simulate_subparser(subparsers):
                           help='Fragment length distribution (mean and stdev, '
                                'default: DEFAULT)')
     sim_args.add_argument('--identity', type=str, default='95,99,2.5',
-                          help='Sequencing identity distribution (mean, max and stdev for beta '
-                               'distribution, or mean and stdev for normal qscore distribution , '
+                          help='Sequencing identity distribution (mean,max,stdev for beta '
+                               'distribution, or mean,stdev for normal qscore distribution, '
                                'default: DEFAULT)')
     sim_args.add_argument('--error_model', type=str, default='nanopore2023',
                           help='Can be "nanopore2018", "nanopore2020", "nanopore2023", '