Align differential.test.js with #2457

Author: ericcornelissen

test/unit/win/differential.test.js

@@ -1,6 +1,6 @@
 /**
- * @overview Contains differential tests for the migration form standard regular
- * expressions to linear-time regular expressions in PoewrShell.
+ * @overview Contains (additional) unit tests for the escaping functionality for
+ * PowerShell.
  * @license MIT
  */
 
@@ -33,8 +33,11 @@ testProp(
     const updFn = upd.getQuoteFunction();
     const oldFn = old.getQuoteFunction();
 
-    const got = updFn[0](updFn[1](arg));
-    const want = oldFn[0](oldFn[1](arg));
+    const [updEscape, updQuote] = updFn;
+    const [oldEscape, oldQuote] = oldFn;
+
+    const got = updQuote(updEscape(arg));
+    const want = oldQuote(oldEscape(arg));
     t.is(got, want);
   },
   { numRuns },