Legacy `=` mixin definitions missing from Stylus compressed output
Goal Migrate a small application's Stylus stylesheets from legacy = mixin syntax to Stylus 1.x without service interruption while keeping compiled CSS output stable. Constraints Stylus 0.x and 1.x handle variable interpolation differently, and the newer --compress flag may drop mixins defined with the legacy = sign syntax. It is unclear whether existing = mi
stylus