class Byebug::InfoCommand::DisplayCommand

def self.description
  <<-EOD
    inf[o] d[display]
    #{short_description}
  EOD
end

def self.regexp
  /^\s* d(?:isplay)? \s*$/x
end

def self.short_description
  'List of expressions to display when program stops'
end

def execute
  unless Byebug.displays.find { |d| d[0] }
    return puts('There are no auto-display expressions now.')
  end
  puts 'Auto-display expressions now in effect:'
  puts 'Num Enb Expression'
  Byebug.displays.each_with_index do |d, i|
    puts(format('%3d: %s  %s', i + 1, d[0] ? 'y' : 'n', d[1]))
  end
end