Fix typos

test/built-ins/FinalizationGroup/gc-has-one-chance-to-call-cleanupCallback.js

@@ -37,7 +37,7 @@ var called = 0;
 // More info at %FinalizationGroupCleanupIteratorPrototype%.next ( )
 function cb() {
   called += 1;
-};
+}
 
 var fg = new FinalizationGroup(function() {
   cleanupCallback += 1;

test/built-ins/FinalizationGroup/prototype/cleanupSome/cleanup-prevented-with-unregister.js

@@ -31,8 +31,7 @@ var fg = new FinalizationGroup(function() {});
 var unregA = {};
 var unregB = {};
 var unregC = {};
-var unregDE = {};
-var unregDE = {};
+var unregDE = {}; // Use the same unregister token for D and E
 
 function emptyCells() {
   (function() {

test/built-ins/FinalizationGroup/prototype/cleanupSome/gc-cleanup-not-prevented-with-wr-deref.js

@@ -26,7 +26,7 @@ features: [FinalizationGroup, WeakRef, host-gc-required]
 var holdingsList;
 function cb(iterator) {
   holdingsList = [...iterator];
-};
+}
 var fg = new FinalizationGroup(function() {});
 
 var deref = false;