Javier Jaramago Fernández

Could be possible to solve the issue including a specific locale as the second argument for std::is_space? Like: ``` auto wsfront = std::find_if_not(s.begin(), s.end(), [](int c) { return std::isspace(c, std::locale("en_US.UTF8"));...

Hi there, I was going to make a PR for this, but after reading the `CONTRIBUTING` guidelines, I have seen that there is a no-new options policy **very clearly stated**....