🧪 test: Correct str fixture implementation.

Author: make-github-pseudonymous-again

test/src/_fixtures.js

@@ -1,5 +1,5 @@
 export function str(any) {
 	const s = JSON.stringify(any);
-	if (s <= 40) return s;
+	if (s.length <= 40) return s;
 	return s.slice(0, 19) + '..' + s.slice(-19);
 }