[Ruby]putsする文字列に色を付けるやつ。シェルで、echo -e しても動いた。coloringの引数には、1つ目に文字列、2つ目以降に装飾・文字色・背景色（複数指定可）をString型で、カンマ区切りで指定する。ライセンスはMIT License

LICENSE

Copyright (c) 2013 Shusui MOYATANI

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of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
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puts_coloring.rb

module Coloring
  COLORS = {
    'bold'      => '1',
    'underscore'=> '4',
    'black'     => '30',
    'red'       => '31',
    'green'     => '32',
    'yellow'    => '33',
    'blue'      => '34',
    'magenta'   => '35',
    'cyan'      => '36',
    'white'     => '37',
    'bg_black'  => '40',
    'bg_red'    => '41',
    'bg_green'  => '42',
    'bg_yellow' => '43',
    'bg_blue'   => '44',
    'bg_magenta'=> '45',
    'bg_cyan'   => '46',
    'bg_white'  => '47'
  }.freeze
  def coloring(text, *a_colors)
    "\e[" + a_colors.map!{|s| COLORS.key?(s) ? COLORS[s] : s }.join(";") + "m#{text}\e[0m" end
  module_function :coloring
end