sub draw_hangman - function interpolation

sub draw_hangman (Str ?$msg) returns Str {
    "Hangman (with the Pugs AUTHORS list)
    
  +-----+       The committer's name is:
  |     |       { draw_board }
  |     { draw_if_greater_than('O', 1) }   
  |    {
          draw_if_greater_than('/', 2) ~
          draw_if_greater_than('|', 3) ~
          draw_if_greater_than('\\', 4)
       }      You have already guessed:
  |    { draw_if_greater_than('/', 5) } {
          draw_if_greater_than('\\', 6)
       }      [@guesses[]]
  |         
|-+--------|

$msg";
}