This is currently only used by CSS attr ref tests, but is useful outside of attr ref tests as well. Give a more generic name to this ref file for this usage.
@@ -1,5 +1,5 @@
<!doctype html>
-<link rel="match" href="reference/css-attr-ref.html" />
+<link rel="match" href="reference/text-div.html" />
<style>
.foo::before {
content: attr(bar);
content: attr(bar, "Well, hello friends!");