Test append() with a map argument on Dart Sass.
Test append() with a map argument on Dart Sass.

nschonni/sass-spec,xzyfer/sass-spec,xzyfer/sass-spec,nschonni/sass-spec,mgreter/sass-spec,mgreter/sass-spec,mgreter/sass-spec,nschonni/sass-spec,sass/sass-spec,xzyfer/sass-spec,sass/sass-spec,sass/sass-spec,xzyfer/sass-spec,nschonni/sass-spec,sass/sass-spec