Function toLower

Bcore/src/main/cpp/Dobby/tests/catch.hpp:9520–9524

  std::transform(s.begin(), s.end(), s.begin(), toLowerCh);
}
std::string toLower(std::string const &s) {
  std::string lc = s;
  toLowerInPlace(lc);
  return lc;
}
std::string trim(std::string const &str) {
  static char const *whitespaceChars = "\n\r\t ";
  std::string::size_type start       = str.find_first_not_of(whitespaceChars);