Fix SEO Plugin to show meta robots index,follow in WordPress

Using the recent WordPress version (3.8) with a SEO plugin (SEO Ultimate, WP SEO, Yoast), the robots information for index,follow did not appear anymore. If you are using these plugins and don’t see any index and follow anymore, this might help you. Here is my fix for WP SEO by Yoast: Edit the file  wp-content/plugins/wordpress-seo/frontend/class-frontend.php look…