Reducer no longer works on 1.9

[mkaito]

This is just a single example. Just run the specs to get more.

/[:stuff:]/.gen
TypeError: [:stuff] is not a symbol
from /usr/local/lib/ruby1.9/gems/1.9.1/gems/randexp-0.1.5/lib/randexp/reducer.rb:97:in randgen' from /usr/local/lib/ruby1.9/gems/1.9.1/gems/randexp-0.1.5/lib/randexp/reducer.rb:20:inrandom'
from /usr/local/lib/ruby1.9/gems/1.9.1/gems/randexp-0.1.5/lib/randexp/reducer.rb:4:in reduce' from /usr/local/lib/ruby1.9/gems/1.9.1/gems/randexp-0.1.5/lib/randexp.rb:9:inreduce'
from /usr/local/lib/ruby1.9/gems/1.9.1/gems/randexp-0.1.5/lib/randexp/core_ext/regexp.rb:3:in generate' from (irb):5 from /usr/local/bin/irb:12:in

'

[probablykabari]

All specs are passing in 1.9.2 currently.