Prettier updates

package.json

@@ -1,5 +1,5 @@
 {
   "devDependencies": {
-    "prettier": "^3.3.3"
+    "prettier": "^3.6.2"
   }
 }

test/datetime_handling_tests.js

@@ -311,7 +311,8 @@ exports.init = function () {
   );
 
   function TestComparison(func, a, comparison, b, ignoreSec, expected) {
-    (a = new Date(a)), (b = new Date(b));
+    a = new Date(a);
+    b = new Date(b);
     const result = func(a, comparison, b, ignoreSec);
     return result === expected || `Expected "${expected}", got "${result}"`;
   }