[presubmit] Enable readability/namespace linter checking.

src/heap/objects-visiting-inl.h

Index: src/heap/objects-visiting-inl.h
diff --git a/src/heap/objects-visiting-inl.h b/src/heap/objects-visiting-inl.h
index 55734fd463a4e538baa0ad353167f2091bb148de..ab0b357f40499c07305e9c2cd1ea6eba50ca77d4 100644
--- a/src/heap/objects-visiting-inl.h
+++ b/src/heap/objects-visiting-inl.h
@@ -902,7 +902,7 @@ void Code::CodeIterateBody(Heap* heap) {
     it.rinfo()->template Visit<StaticVisitor>(heap);
   }
 }
-}
-}  // namespace v8::internal
+}  // namespace internal
+}  // namespace v8
 
 #endif  // V8_OBJECTS_VISITING_INL_H_