Method insert

include/stringzilla/stringzilla.hpp:3691–3695

* @brief Inserts @b (in-place) one ::character at the given iterator position. * @throw `std::out_of_range` if `pos > size()` or `other_index > other.size()`. * @throw `std::length_error` if the string is too long. * @throw `std::bad_alloc` if the allocation fails. */

     *  @throw `std::bad_alloc` if the allocation fails.
     */
    iterator insert(const_iterator it, char_type character) noexcept(false) sz_lifetime_bound_ {
        auto pos = range_length(cbegin(), it);
        insert(pos, string_view(&character, 1));
        return begin() + pos;
    }

    /**
     *  @brief Inserts @b (in-place) a ::character multiple times at the given iterator position.