message: Minor documentation fix in intrusive_ptr.
diff: @@ -21,10 +21,14 @@ namespace core {
  // A utility for managing the lifetime of ref-counted objects.
  //
  // Generally used for objects that derive from `tensorflow::RefCounted`.
  -// Use add_ref = true to take ownership of the raw ptr.
  template <class T>
  class IntrusivePtr {
  public:
  + // add_ref=false indicates that IntrusivePtr owns the underlying pointer.
  + //
  + // In most cases, we expect this to be called with add_ref=false, except in
  + // special circumstances where the lifetime of the underlying RefCounted
  + // object needs to be externally managed.
  IntrusivePtr(T* h, bool add_ref) { reset(h, add_ref); }
  IntrusivePtr(const IntrusivePtr& o) { reset(o.handle_, /*add_ref=*/true); }
  IntrusivePtr(IntrusivePtr&& o) {
  