TestShell: Fix typo in TestShell warning printout
TestShell: Fix typo in TestShell warning printout

Former-commit-id: 8dc111ee19537166c9db6e6144a3bf3ae4488b8b
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin