class String

  def colorize(color_code) "\e[#{color_code}m#{self}\e[0m" ; end

  def bold()   colorize('1') ; end
  def invert() colorize('7') ; end

  def red()   colorize('31') ; end
  def blue()  colorize('34') ; end
  def green() colorize('32') ; end

  def undent() gsub(/^.{#{slice(/^ +/).length}}/, '') ; end

end