def colorize (arg)
      arg = Yummi::Context::new(arg) unless arg.is_a? Context
      Yummi.colorize arg.value.to_s, color_for(arg)
    end
def colorize (arg)
      arg = Yummi::Context::new(arg) unless arg.is_a? Context
      Yummi.colorize arg.value.to_s, color_for(arg)
    end
Colorizes a string by passing the arguments to the :call: method to get the proper
 color.

 === Args

 A context or a value.