チルダがRubyのヒアドキュメントをもっと良くするRubyのヒアドキュメントは便利です。複数行に渡る整形文章を出力するときに、これを使わない手はありません。 class ATool def self.help lines = <<EOS Instruction of `#{self}` `#{self}` is one of a great tool in the world. This helps you a lot on your daily work. Your life will be changed with `#{self}`!! Everyone knows about `#{self}`. So, You can ask them to learn `#{self}` Just Use `#{self}` from Today! EOS lines end end puts ATool.help # >> Instruct
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