Sass 3.4.16 发布，此版本更新内容如下：
When converting from Sass to SCSS or vice versa, double-space around nested rules the same as around top-level rules.
Compatibility with listen 3.
Parse a minus operator with no surrounding whitespace (e.g. 20px-10px) the same regardless of whether it's being used in a static property.
下载：https://github.com/sass/sass/archive/3.4.16.zip。
Sass 扩展了 CSS3，增加了规则、变量、混入、选择器、继承等等特性。Sass 生成良好格式化的 CSS 代码，易于组织和维护。
来自:开源中国社区
