fixed options.flatten header
fixed options.flatten header

jwvdiermen/grunt-include-source,flyingswan3000/grunt-include-source,jwvdiermen/grunt-include-source,kamilkisiela/grunt-include-source,kamilkisiela/grunt-include-source,kamilkisiela/grunt-include-source,kamilkisiela/grunt-include-source,jwvdiermen/grunt-include-source,flyingswan3000/grunt-include-source,flyingswan3000/grunt-include-source,flyingswan3000/grunt-include-source,jwvdiermen/grunt-include-source