era_ja 1.3.0
Convert to Japanese era.
          Gemfile:
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          安装:
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      Development 依赖 (6):
            guard-rspec
            ~> 4.5.0
          
          
            rake
            >= 12.3.3
          
          
            rb-fsevent
            ~> 0.9.4
          
          
            rspec
            ~> 3.1.0
          
          
            terminal-notifier-guard
            ~> 1.6.4
          
          
            yard
            ~> 0.9.12
          
    