instance method expanded

# File railties/lib/rails/paths.rb, line 152
      def expanded
        raise "You need to set a path root" unless @root.path
        result = []

        each do |p|
          path = File.expand_path(p, @root.path)

          if @glob
            if File.directory? path
              result.concat expand_dir(path, @glob)
            else
              # FIXME: I think we can remove this branch, but I'm not sure.
              # Say the filesystem has this file:
              #
              #   /tmp/foobar
              #
              # and someone adds this path:
              #
              #   /tmp/foo
              #
              # with a glob of "*", then this function will return
              #
              #   /tmp/foobar
              #
              # We need to figure out if that is desired behavior.
              result.concat expand_file(path, @glob)
            end
          else
            result << path
          end
        end

        result.uniq!
        result
      end