I wonder if any one has ever noticed the "order" discrepancy that exists 
between String#<=> and String#succ. One consequence:

  irb(main):001:0> a = 'a'..'b'
  => "a".."b"
  irb(main):002:0> a.include?('aa')
  => true

Also I'd like to know what others are doing with string ranges. If you've used 
a string range in a serious way I'd like to know how --I'm trying to get a 
impression of their over all usability.

Thanks,
T.