Welcome the stable 3.5 LibSass release 🎉 🎉 🎉 This release contains most Sass 3.5 features, and many many bug fixes and optimisations. Features Implement trailing commas in parameters and arguments (#2070, @xzyfer) Implement deprecation warning for ID strings that look like colors (#2302, @xzyfer) Implement content-exists function (#2266, @xzyfer) Implement support for passing var() to CSS funct