Bug 1782212 - Part 20: Add curly brackets to js/src/builtin/Weak{Map,Set}.js. r=tcampbell

Depends on D153190

Differential Revision: https://phabricator.services.mozilla.com/D153191

js/src/builtin/WeakMap.js

@@ -11,14 +11,16 @@ function WeakMapConstructorInit(iterable) {
     var adder = map.set;
 
     // Step 6.b.
-    if (!IsCallable(adder))
+    if (!IsCallable(adder)) {
         ThrowTypeError(JSMSG_NOT_FUNCTION, typeof adder);
+    }
 
     // Steps 6.c-8.
     for (var nextItem of allowContentIter(iterable)) {
         // Step 8.d.
-        if (!IsObject(nextItem))
+        if (!IsObject(nextItem)) {
             ThrowTypeError(JSMSG_INVALID_MAP_ITERABLE, "WeakMap");
+        }
 
         // Steps 8.e-j.
         callContentFunction(adder, map, nextItem[0], nextItem[1]);

js/src/builtin/WeakSet.js

@@ -11,10 +11,12 @@ function WeakSetConstructorInit(iterable) {
     var adder = set.add;
 
     // Step 6.b.
-    if (!IsCallable(adder))
+    if (!IsCallable(adder)) {
         ThrowTypeError(JSMSG_NOT_FUNCTION, typeof adder);
+    }
 
     // Steps 6.c-8.
-    for (var nextValue of allowContentIter(iterable))
+    for (var nextValue of allowContentIter(iterable)) {
         callContentFunction(adder, set, nextValue);
+    }
 }