Symbols ' and \\n fails to produce same output #253
Description
Saved and loaded data is not the same in case symbols ' and \n are used together
ryml::Tree tree;
ryml::NodeRef root = tree.rootref();
root |= ryml::MAP;
root["t"] = "t't\\nt";
std::string s = ryml::emitrs<std::string>(tree);
ryml::csubstr yml = ryml::csubstr(s.c_str(), s.size());
tree = ryml::parse_in_arena(yml);
root = tree.rootref();
auto s1 = root["t"].val();
const bool equal = s == s1;