所需文件
- pathname
- active_support
- active_support/core_ext/kernel/reporting
- active_support/core_ext/module/delegation
- active_support/core_ext/array/extract_options
- active_support/core_ext/object/blank
- rails/version
- rails/deprecator
- rails/application
- rails/backtrace_cleaner
- active_support/railtie
- action_dispatch/railtie
命名空间
- 模块 ActiveSupport
- 模块 Rails