Method fill

src/data/string_set.h:103–108

	}

	void fill(size_t n, T v)
	{
		limits_.push_back(raw_len() + n + padding_len);
		data_.insert(data_.end(), n, v);
		data_.insert(data_.end(), padding_len, padding_char);
	}

	T* ptr(size_t i)
	{ return &data_[limits_[i]]; }