is_array is not supported if we pass options as a block to `desc`

[ysv]

Old style desc works well for me

desc 'Get list of user accounts',
  is_array: true,
  success: Entities::Account

But since passing it via hash is deprecated I've tried to pass it via block and it didn't work for me

desc 'Get list of user accounts' do
  success Entities::Account
  is_array true
end

same for this

desc 'Get list of user accounts', is_array: true do
  success Entities::Account
end

How array response should be described in documentation using block ?

[ysv]

related to #706

[ysv]

closed in ruby-grape/grape#1791