When I use C# or Perl, there are some useful tools like StyleCop, FxCop, Perl::Critic and Perltidy. They can check or format my code automatically. Then, are there any equivalent tools for Ruby or Rails? I found some tools on Google, but I felt they are not maintained so frequently.When I use C# or Perl, there are some useful to
阅读背景：
为Ruby / Rails编写样式检查程序或代码格式化程序
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