rails/rails — pull request #4722 by kennyj (2012-01-27 14:15:26+00:00)
Title: Remove redundant instance_variables (@colorize_logging)

The setting for colorize logging is present in two place.

```
config.colorize_logging
```

and

```
ActiveSupport::LogSubscriber.colorize_logging
```

This duplication is a little difficult to understand.
Because config.colorize_logging is set to nil in default, but ActiveSupport::LogSubscriber.colorize_logging is set to true.

Please see https://github.com/rails/rails/issues/4708 .