# File lib/bootstrap_form/helpers/bootstrap.rb, line 69
      def prepend_and_append_input(options, &block)
        options = options.extract!(:prepend, :append, :input_group_class)
        input_group_class = ["input-group", options[:input_group_class]].compact.join(' ')

        input = capture(&block)

        input = content_tag(:span, options[:prepend], class: input_group_class(options[:prepend])) + input if options[:prepend]
        input << content_tag(:span, options[:append], class: input_group_class(options[:append])) if options[:append]
        input = content_tag(:div, input, class: input_group_class) unless options.empty?
        input
      end