prettier/tests/css_postcss_plugins/postcss-simple-vars.css

background-color: $$(style)Color;
background-color: $$(style)Color Color122;
color: @@color;
font: 100% $font-stack;
background-color: darken(@link-color, 10%);
border: 1px solid var(--border-color);
color: $(style)color;
color: @@(style) color123;
color: @@(style)color123;