# File lib/mspec/runner/mspec.rb, line 232
232:   def self.shuffle(ary)
233:     return if ary.empty?
234: 
235:     size = ary.size
236:     size.times do |i|
237:       r = rand(size - i - 1)
238:       ary[i], ary[r] = ary[r], ary[i]
239:     end
240:   end