Wed Feb 15 11:49:41 2012  Aaron Patterson <aaron@tenderlovemaking.com>

	* lib/journey/formatter.rb: reject non-truthy parameters parts.
          Fixes rails ticket #4587

Mon Jan 23 17:07:53 2012  Aaron Patterson <aaron@tenderlovemaking.com>

	* Added symbol? and literal? predicate methods to the ast nodes for
        easier AST traversal.
        * Made the dummy node a real class.