See https://github.com/pre-commit/pre-commit-hooks?tab=readme-ov-file#trailing-whitespace
iOS RenderTestRunner App
The test instantiates ObjC object of class IosTestRunner from the app, the class will instantiates a C++ object from the linked library mbgl-render-test and calls running render test function on it. It subsequently deletes the C++ object pointer. In the end, the test will check the existence of test reports, which are html files that attach to xctest result.