The last post in this topic fixes the problem!
You must replace line 26 with:
$this->method_description = __( 'Increase your social media exposure by 10 percent! ShareYourCart helps you get more customers by motivating satisfied customers to talk with their friends about your products. For help with ShareYourCart view the <a href="http://www.woothemes.com/woocommerce-docs/user-guide/shareyourcart/">documentation</a>.', 'woocommerce' );
Until this plugin is ready you can use the atributes and “woocommerce layered nav” widget to achieve this kind of filters.
http://wcdocs.woothemes.com/user-guide/setting-up-product-attributes/
http://wcdocs.woothemes.com/user-guide/layered-navigation-widget/
You can chain multiple filters and even combine them with the price slider filter.
Or you can press Ctrl+Shift+End after ?>, this will select everything to the end of the file including white spaces. I had that problem too, and removing the white spaces fixed it. Thanks!
