Simpler color syntax

[ghost]

It seems this is the simplest for color output:

require 'logging'
Logging.appenders.stdout(
   'k', :layout => Logging.layouts.pattern(:color_scheme => :default)
)
z = Logging.logger[0]
z.add_appenders 'k'
z.warn 'abcde'

compare with some Python options:

import logging
logging.warning('abcde')

import colorlog
colorlog.warning('abcde')

from logzero import logger
logger.warning('abcde')