Invalid CSS output when using interpolation with mixins

[Jasonkoolman]

Consider the following SCSS code:

@mixin set-border($width) {
    border: $width solid #000;
}

.element {
    @include set-border(2px); // compiles to "2px solid #000"
}

Now using interpolation:

.element {
    @include set-border(#{2px + 2px}); // compiles to "4pxsolid #000"
}

Notice that there is no whitespace between the border width and style declaration.

Hoping this is an easy fix. Thanks in advance 👍

[a-dg]

@Jasonkoolman I know this isn't a long-term solution, but changing your mixin to border: #{$width} solid #000; solves the issue for me.

[Cerdic]

Should be fixed with #694