class Rake::Application

def display_tasks_and_comments
  displayable_tasks = tasks.select { |t|
    t.comment && t.name =~ options.show_task_pattern
  }
  if options.full_description
    displayable_tasks.each do |t|
      puts "rake #{t.name_with_args}"
      t.full_comment.split("\n").each do |line|
        puts "    #{line}"
      end
      puts
    end
  else
    width = displayable_tasks.collect { |t| t.name_with_args.length }.max || 10
    max_column = 80 - name.size - width - 7
    displayable_tasks.each do |t|
      printf "#{name} %-#{width}s  # %s\n",
        t.name_with_args, truncate(t.comment, max_column)
    end
  end
end