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由 yuuji.yaginuma 提交于
Since `Thor::HELP_MAPPINGS` contains `-D`, so `bin/rails -D` show rails's help. But, in Rails 5.0.1, `bin/rails -D` show the description of rake task. I think that it is better to have the same behavior.
073f4ecb
Since `Thor::HELP_MAPPINGS` contains `-D`, so `bin/rails -D` show rails's help. But, in Rails 5.0.1, `bin/rails -D` show the description of rake task. I think that it is better to have the same behavior.