Method to_lower

util/generic/string.cpp:21–23

template <>
bool TBasicString<char, std::char_traits<char>>::to_lower(size_t pos, size_t n) {
    return Transform([](size_t, char c) { return AsciiToLower(c); }, pos, n);
}

template <>
bool TBasicString<char, std::char_traits<char>>::to_upper(size_t pos, size_t n) {