`./mach test-ref` no longer eats the first "-" prefixed argument for test name filtering, instead using an explicit "--name" argument. This should avoid any potential confusion when passing down arguments to servo. Also allows for ./tests/ref to be included (and trimmed away) for tab completion convenience (`./mach test` has also been updated to take advantage of this when inferring tests from file paths). (fixes #4091) Source-Repo: https://github.com/servo/servo Source-Revision: b87d98e468d6c405dd02625e3e223e2412db8610