util.cpp
// trim from both ends (in place)
trim from both ends (in place)
trim from both ends ( in place )
void trim(std::string & s, const std::string & chrs) {
            ltrim(s, chrs);
            rtrim(s, chrs);
        }
void trim ( std :: string & s , const std :: string & chrs ) { ltrim ( s , chrs ) ; rtrim ( s , chrs ) ; }
trim from both ends (in place)
trim from both ends ( in place )
//std::cerr << s << "   A\n"; //std::cerr << s << "   B\n"; //std::cerr << s << "\n";