help (Thor)

    # File lib/thor.rb, line 124
      def help(task = nil)
        if task
          if task.include? ?:
            task = self.class[task]
            namespace = true
          else
            task = self.class.tasks[task]
          end

          puts task.formatted_usage(namespace)
          puts task.description
        else
          puts "Options"
          puts "-------"
          self.class.tasks.each do |_, task|
            format = "%-" + (self.class.maxima.usage + self.class.maxima.opt + 4).to_s + "s"
            print format % ("#{task.formatted_usage}")
            puts  task.description.split("\n").first
          end
        end
      end