Function minify_css 

pub fn minify_css(css: &str) -> String

Minifies CSS by collapsing insignificant whitespace and dropping comments.

ssg’s own implementation rather than a dependency: minification rewrites every stylesheet the generator emits, so a bug here is a bug on every page, and a parser that “improves” a selector can silently change what it matches. This pass only removes what cannot matter - it never rewrites a selector, a value or a string.