message: change windows loginShell() from cmd.exe to powershell.exe (more test cases possible)
diff: @@ -216,7 +216,7 @@ Process::ExitStatus Process::wait()
  std::string Process::loginShell()
  {
  #if defined(_MSC_VER)
  - return "cmd.exe"s;
  + return "powershell.exe"s;
  #else
  if (passwd const* pw = getpwuid(getuid()); pw != nullptr)
  return pw->pw_shell;
  