def warn(m)
      puts _word_wrap(m, '# ').yellow
      @targets.each { |_, t| t.warn(m) }
    end
def warn(m)
      puts _word_wrap(m, '# ').yellow
      @targets.each { |_, t| t.warn(m) }
    end
Outputs a formatted-yellow warning message.
 @param [String] m The message to output
 @return [void]