add blank line for readability between test cases

Co-authored-by: Jonas Jenwald <jonas.jenwald@gmail.com>

test/unit/api_spec.js

@@ -3418,6 +3418,7 @@ Caron Broadcasting, Inc., an Ohio corporation (“Lessee”).`)
 
       await loadingTask.destroy();
     });
+
     it("gets text content, correctly handling documents with toUnicode cmaps that omit leading zeros on hex-encoded UTF-16", async function () {
       const loadingTask = getDocument(
         buildGetDocumentParams("issue18099_reduced.pdf")