Regularize namespace closing curlies

src/runtime/runtime-maths.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/arguments.h"
 #include "src/assembler.h"
 #include "src/codegen.h"
 #include "src/runtime/runtime-utils.h"
@@ skipping 234 matching lines @@
 
 
 RUNTIME_FUNCTION(Runtime_IsMinusZero) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_CHECKED(Object, obj, 0);
   if (!obj->IsHeapNumber()) return isolate->heap()->false_value();
   HeapNumber* number = HeapNumber::cast(obj);
   return isolate->heap()->ToBoolean(IsMinusZero(number->value()));
 }
-}
-}  // namespace v8::internal
+}  // namespace internal
+}  // namespace v8