The code based on the logger Rails uses by default; as mentioned in the
Rails configuration guide:
> [the logger] defaults to an instance of ActiveSupport::TaggedLogging
> that wraps an instance of ActiveSupport::Logger which outputs a log to
> the log/ directory. You can supply a custom logger, to get full
> compatibility you must follow these guidelines:
>
> * To support a formatter, you must manually assign a formatter from
> the config.log_formatter value to the logger.
> * To support tagged logs, the log instance must be wrapped with
> ActiveSupport::TaggedLogging.
> * To support silencing, the logger must include
> ActiveSupport::LoggerSilence module. The ActiveSupport::Logger class
> already includes these modules.
e077c7e890