Update notes for submitted changes
* CheckoutCommandTest: Create Git instances in try-with-resource
* BranchCommandTest: Create Git instances in try-with-resource
* CheckoutTest: Create Git instances in try-with-resource
* BranchTest: Create Git instances in try-with-resource
* URIishTest: Use @Test annotation's `expected` argument
* Suppress "The allocated object is never used" warning in tests
* Add $NON-NLS to suppress "Non-externalized string literal" warnings
* Don't use deprecated constructors of CmdLineException