Method append

modules/core/core/include/OpenString/common/sequence.h:417–421

	template <class T, u64 I>
	void sequence<T, I>::append(const T* const source, const u64 size) noexcept
	{
		this->push_back_uninitialized(size);
		std::copy_n(source, size, this->data_at(this->size_ - size));
	}

	template <class T, u64 I>
	bool sequence<T, I>::is_short() const noexcept