Mitsutaka Mimura

I noticed that CI is failed in the edge Rails. `ActiveRecord::Base.configurations` in edge rails returns Symbol key. And I watched @JuanitoFatas and @eileencodes discussion. https://github.com/amatsuda/database_rewinder/pull/70#discussion_r392863164 I was referring to this...

ref #123 add following configuration for csv. - csv column separator :: Adhoq.config.csv_column_separator - csv row separator :: Adhoq.config.csv_row_separator

ignore abstruct_class from table#show

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https://github.com/esminc/adhoq/pull/70#discussion_r38904370

[Idobata](https://idobata.io/en/home) is a chat service.

_ の取り扱いが GFM と違う

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以下のような文字の次にアンダースコアが来るようなときは、 イタリックに変換されないように GFM はなっているのですが、 イタリックに変換されているようです。 kei_s t_wada

I think some repository is able to skip clone . how about do you think?

We showld stop using open-uri, because `Kernel#open` change unintentionally by the user, and `Kewrnel#open` has Security Issue. https://github.com/bbatsov/rubocop/blob/master/manual/cops_security.md#securityopen

This PR removes the warning message because prime Libraly will be the default gem. ``` ruby/openssl/test/openssl/test_bn.rb:266: warning: prime was loaded from the standard library, but is not part of the...