hub fix for `hub clone a / b` => `hub clone a/b`

Hub.rb

module Hub
  class Runner
    attr_reader :args
    
    def initialize(*args)

      # $ hub ["clone", "rtomayko", "/", "tilt"] => hub ["clone", "rtomayko/tilt"]
      if args[0] == "clone" and args[2] = "/" and args.length == 4
        args = ["clone", args[1..3].join]
      end

      @args = Args.new(args)
      Commands.run(@args)
    end