normalize_groups

# File lib/bundler/cli/install.rb, line 148
    def normalize_groups
      options[:with] &&= options[:with].join(":").tr(" ", ":").split(":")
      options[:without] &&= options[:without].join(":").tr(" ", ":").split(":")

      check_for_group_conflicts_in_cli_options

      Bundler.settings.set_command_option :with, nil if options[:with] == []
      Bundler.settings.set_command_option :without, nil if options[:without] == []

      with = options.fetch(:with, [])
      with |= Bundler.settings[:with].map(&:to_s)
      with -= options[:without] if options[:without]

      without = options.fetch(:without, [])
      without |= Bundler.settings[:without].map(&:to_s)
      without -= options[:with] if options[:with]

      options[:with]    = with
      options[:without] = without
    end