gruff patch for ruby 1.9.3

base.rb

# config/initializers/gruff/base.rb
module Gruff
  class Base
    def label_with_ruby193(value)
      if @marker_count.to_f == 0
        label = value.to_i.to_s

        parts = label.split('.')
        parts[0].gsub!(/(\d)(?=(\d\d\d)+(?!\d))/, "\\1#{THOUSAND_SEPARATOR}")
        parts.join('.')
      else
        label_without_ruby193(value)
      end 
    end 
    alias_method_chain :label, :ruby193
  end 
end