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由 Sean McGivern 提交于
1. Move render method to a concern, not a helper. 2. Let DiffHelper#diff_options automatically add the path option. 3. Move more instance var definitions to before filters.
ff55398a
1. Move render method to a concern, not a helper. 2. Let DiffHelper#diff_options automatically add the path option. 3. Move more instance var definitions to before filters.