Customizing the help output

Here's some typical output that comes directly from the default argparse.print_help() code:

usage: ch18_ex1.py [-v] [--debug] [--dealerhit {Hit17,Stand17}]
                   [--resplit {ReSplit,NoReSplit,NoReSplitAces}]
                   [--decks DECKS] [--limit LIMIT] [--payout PAYOUT]
                   [-p {SomeStrategy,AnotherStrategy}]
                   [-b {Flat,Martingale,OneThreeTwoSix}] [-r ROUNDS]
                   [-s STAKE] [--samples SAMPLES] [-V] [-?]
                   output

Simulate Blackjack

positional arguments:
  output

optional arguments:
  -v, --verbose
  --debug
  --dealerhit {Hit17,Stand17}
  --resplit {ReSplit,NoReSplit,NoReSplitAces}
  --decks DECKS Decks to deal (default: 6)
  --limit LIMIT
  --payout PAYOUT
  -p {SomeStrategy,AnotherStrategy}, --playerstrategy {SomeStrategy,AnotherStrategy}
  -b {Flat,Martingale,OneThreeTwoSix}, -...