v4-dev is using Jekyll, not Hugo.
Example where the calc is valid:
-{{< highlight scss >}}
+{% highlight scss %}
$border-radius: .25rem;
$border-width: 1px;
// Output the same calc(.25rem - 1px) as above
border-radius: subtract($border-radius, $border-width);
}
-{{< /highlight >}}
+{% endhighlight %}
Example where the calc is invalid:
-{{< highlight scss >}}
+{% highlight scss %}
$border-radius: .25rem;
$border-width: 0;
// Output .25rem
border-radius: subtract($border-radius, $border-width);
}
-{{< /highlight >}}
+{% endhighlight %}
## Sass options